This document contains a technical assessment with 82 multiple choice questions covering topics in electronics and semiconductor devices. The questions assess knowledge of key concepts like resistivity of materials like silicon and germanium, properties of intrinsic and doped semiconductors, diode characteristics, transistor operation, digital circuits, color television systems, communication systems, and operational amplifiers.
Electronics and Communication Engineering is the Branch of Engineering. Electronics and Communication Engineering field requires an understanding of core areas including Engineering Graphics, Computer Programming,Electronics Devices and Circuits-I, Network Analysis, Signals and Systems, Communication Systems, Electromagnetics Engineering, Digital Signal Processing, Embedded Systems, Microprocessor and Computer Architecture. Ekeeda offers Online Mechanical Engineering Courses for all the Subjects as per the Syllabus.
Visit : https://ekeeda.com/streamdetails/stream/Electronics-and-Communication-Engineering
This chapter discusses the frequency response of amplifiers. It begins with fundamental concepts and high-frequency models of transistors. It then analyzes the frequency response of common emitter, common source, common base, and common gate stages. Additional topics covered include frequency response of followers, cascode stages, differential pairs, and more examples. Analysis methods like Bode plots, pole identification, and Miller's theorem are explained. Key factors that influence frequency response like bandwidth, gain rolloff, and various transistor capacitances are also analyzed.
This document contains 50 sample questions for a Radio Amateur Examination (RAE) revision. The questions cover topics such as electrical components, circuits, radio wave properties, instruments and their uses. Example question topics include power supplies, Ohm's law, antenna polarization, bandwidth, propagation and receiver concepts.
This document provides 116 technical questions covering a wide range of topics including integrated circuits, amplifiers, transistors, digital logic, microprocessors, C programming, electronics, and instrumentation. The questions test knowledge of concepts like heat dissipation, gain calculations, transistor characteristics, digital logic gates, microprocessor instruction cycles, data types, and more.
The document contains questions about electronics topics such as resistors, capacitors, transistors, diodes, transformers, circuits, and Kirchhoff's laws. It tests knowledge of components, circuit analysis, and principles of electricity. Multiple choice questions cover topics like component identification, circuit calculations, applications of devices, and explanations of electrical concepts.
This document summarizes the key parameters of an Insulated Gate Bipolar Transistor (IGBT) device model from Mitsubishi. It includes:
1. The model parameters for the IGBT, such as voltage and current values, temperature coefficients, and capacitances.
2. Graphs comparing the simulation results using the model to measurements of the actual device's transfer and saturation characteristics.
3. The simulation circuits used to test the model and validate that it accurately represents the real IGBT's behavior.
The document contains a 25 question multiple choice quiz on analog and digital electronics concepts including operational amplifiers, comparators, and different types of memory. Some key points covered are:
- The characteristics of an ideal operational amplifier including infinite input impedance, infinite voltage gain, and zero output resistance.
- Factors that determine bandwidth and distortion in op-amp circuits such as gain, bandwidth product, and slew rate.
- The use of differential amplifiers in op-amp input stages to provide high common mode rejection ratio.
- How comparators and Schmitt triggers can convert irregular waveforms to regular ones using threshold voltages.
- Different types of read only memory including PROM, E
The document discusses field effect transistors (FETs) and metal-oxide-semiconductor field-effect transistors (MOSFETs). It covers their physical operation, including channel formation, threshold voltage, and applying a small gate-drain voltage. It also discusses MOSFET circuit symbols, DC biasing, and small signal analysis including transconductance and voltage gain.
Electronics and Communication Engineering is the Branch of Engineering. Electronics and Communication Engineering field requires an understanding of core areas including Engineering Graphics, Computer Programming,Electronics Devices and Circuits-I, Network Analysis, Signals and Systems, Communication Systems, Electromagnetics Engineering, Digital Signal Processing, Embedded Systems, Microprocessor and Computer Architecture. Ekeeda offers Online Mechanical Engineering Courses for all the Subjects as per the Syllabus.
Visit : https://ekeeda.com/streamdetails/stream/Electronics-and-Communication-Engineering
This chapter discusses the frequency response of amplifiers. It begins with fundamental concepts and high-frequency models of transistors. It then analyzes the frequency response of common emitter, common source, common base, and common gate stages. Additional topics covered include frequency response of followers, cascode stages, differential pairs, and more examples. Analysis methods like Bode plots, pole identification, and Miller's theorem are explained. Key factors that influence frequency response like bandwidth, gain rolloff, and various transistor capacitances are also analyzed.
This document contains 50 sample questions for a Radio Amateur Examination (RAE) revision. The questions cover topics such as electrical components, circuits, radio wave properties, instruments and their uses. Example question topics include power supplies, Ohm's law, antenna polarization, bandwidth, propagation and receiver concepts.
This document provides 116 technical questions covering a wide range of topics including integrated circuits, amplifiers, transistors, digital logic, microprocessors, C programming, electronics, and instrumentation. The questions test knowledge of concepts like heat dissipation, gain calculations, transistor characteristics, digital logic gates, microprocessor instruction cycles, data types, and more.
The document contains questions about electronics topics such as resistors, capacitors, transistors, diodes, transformers, circuits, and Kirchhoff's laws. It tests knowledge of components, circuit analysis, and principles of electricity. Multiple choice questions cover topics like component identification, circuit calculations, applications of devices, and explanations of electrical concepts.
This document summarizes the key parameters of an Insulated Gate Bipolar Transistor (IGBT) device model from Mitsubishi. It includes:
1. The model parameters for the IGBT, such as voltage and current values, temperature coefficients, and capacitances.
2. Graphs comparing the simulation results using the model to measurements of the actual device's transfer and saturation characteristics.
3. The simulation circuits used to test the model and validate that it accurately represents the real IGBT's behavior.
The document contains a 25 question multiple choice quiz on analog and digital electronics concepts including operational amplifiers, comparators, and different types of memory. Some key points covered are:
- The characteristics of an ideal operational amplifier including infinite input impedance, infinite voltage gain, and zero output resistance.
- Factors that determine bandwidth and distortion in op-amp circuits such as gain, bandwidth product, and slew rate.
- The use of differential amplifiers in op-amp input stages to provide high common mode rejection ratio.
- How comparators and Schmitt triggers can convert irregular waveforms to regular ones using threshold voltages.
- Different types of read only memory including PROM, E
The document discusses field effect transistors (FETs) and metal-oxide-semiconductor field-effect transistors (MOSFETs). It covers their physical operation, including channel formation, threshold voltage, and applying a small gate-drain voltage. It also discusses MOSFET circuit symbols, DC biasing, and small signal analysis including transconductance and voltage gain.
This document discusses electronics topics including conductors, insulators, semiconductors, intrinsic and extrinsic semiconductors, doping, N-type and P-type semiconductors, PN junctions, rectifiers, transistors, operational amplifiers, and logic gates. It provides details on:
- How conductors allow free electron flow while insulators do not, with semiconductors in between.
- The doping process used to create N-type and P-type extrinsic semiconductors.
- How a PN junction forms and its use as a rectifier, allowing current to flow more easily in one direction.
- The basic transistor configuration
This document describes a novel transimpedance amplifier with variable gain. It proposes a new topology using only three active devices and no passive components. Simulations show it achieves comparable noise, bandwidth, and input impedance as a conventional design using 30uW power. Its transimpedance gain can be varied from 68dB to 78dB by adjusting a control voltage, allowing for a 10dB range of programmability. The proposed design occupies less layout space and is well-suited for applications requiring many sensors.
The 2N3773 is a silicon NPN power transistor intended for use in power switching circuits such as relay or solenoid drivers. It has a TO-3 package and can withstand collector currents up to 16 amps and collector-emitter voltages up to 140 volts. Its key electrical characteristics include a forward current gain ranging from 15 to 60 at an collector current of 8 amps.
This document contains 28 multiple choice questions about analog and digital electronics components, specifically focusing on diodes including zener diodes, photodiodes, varactor diodes, light-emitting diodes, tunnel diodes, and optocouplers. The questions cover characteristics, applications, operating principles and parameters of these different types of diodes.
The document discusses the AC analysis of BJT and MOSFET inverting amplifiers. It begins by stating the lesson objectives which are to draw small signal models, calculate parameters, and analyze performance characteristics like voltage gain, input and output resistances. It then discusses the hybrid-pi model of BJTs and defines the transconductance, output resistance and input resistance. Equivalent circuit models are shown for common-emitter and common-source amplifiers using BJTs and MOSFETs. Calculations are presented for voltage gain, input and output resistances of these amplifiers both with and without bypassing the emitter or source resistances. Examples are also worked through.
The document describes a modified Dickson charge pump design that reduces power consumption during input clock transitions. A PMOS transistor is added in series with each capacitor stage to increase the time constant, slowing the charge transfer. This reduces power from 340.5uW to 28.85uW at no load for the Dickson versus modified design. Output voltages are similar but slightly lower for the modified design. At 10MOhm and 40MOhm loads, power savings during transitions are also realized compared to the standard Dickson design while maintaining comparable output voltages. In conclusion, the modified design successfully reduces transition power consumption without significantly impacting output voltage.
This document describes designing and testing a common collector BJT amplifier circuit using voltage divider bias. The circuit specifications, components, and test procedures are outlined. The amplifier is constructed and its frequency response is measured from 10 Hz to 3 MHz. Gain and bandwidth are calculated from the response graph. Input and output impedances are also experimentally determined by varying the input and measuring the output voltage. The theoretical and practical values are compared.
This document discusses diodes and their applications in electronic circuits. It covers ideal and junction diodes, modeling diodes using exponential, piecewise linear, constant voltage and small signal models. It also discusses zener diodes, rectifiers, peak detectors and their usage in limiting and clamping circuits. Various diode circuits including half-wave, full-wave and bridge rectifiers as well as voltage doublers are described.
This document contains 30 multiple choice questions about analog and digital electronics concepts. The questions cover topics like shift registers, sequential circuits, counters, flip-flops, logic gates, memory and more. Sample questions include the number of clock signals needed to shift an 8-bit value out of a register, what determines the next state in a sequential circuit, and examples of cascading counters to implement a divide-by-60 function.
The document is a practice test for electronics containing 65 multiple choice questions. It covers topics such as basic electronic components like resistors, capacitors, diodes, transistors; circuits; electricity; electronics; transformers; and applications of electronics. The questions test knowledge of properties of components, how components function in circuits, Kirchhoff's laws, and concepts in electricity and electronics. An answer key is provided at the end to check responses.
This document discusses capacitors in series and parallel circuits. It provides the objectives of understanding how to calculate the equivalent capacitance of capacitors connected in series and parallel. Formulas are given for calculating the total capacitance of series circuits as 1/CT = 1/C1 + 1/C2 + 1/C3 and of parallel circuits as CT = C1 + C2 + C3. Examples are included to demonstrate solving problems involving up to three capacitors in series or parallel using these formulas. Quizzes with solutions are also provided to help reinforce the concepts.
Operational amplifiers (OP amps) can be used to build various electronic circuits. An ideal OP amp has infinite input impedance and zero output impedance, with infinite open-loop gain. Common configurations include inverting and non-inverting amplifiers, which provide negative and positive feedback respectively to control the closed-loop gain. Other circuits like summers, integrators, and differentiators can be built by exploiting the high input impedance and voltage amplification properties of OP amps. However, practical OP amps have non-ideal characteristics that must be accounted for, such as finite gain bandwidth, input bias currents, and output saturation levels.
Ac analysis of bjt and mosfet voltage followersMahoneyKadir
This document discusses the AC analysis of BJT and MOSFET voltage follower circuits. It defines the objectives as identifying these circuits and calculating their performance characteristics, including voltage gain, input resistance, and output resistance. It then analyzes common-collector (C-C) and common-drain (C-D) amplifier configurations for voltage followers, providing the small-signal equivalent circuits and equations for terminal voltage gain, input resistance, output resistance, and overall voltage gain.
Transistors can be used as switches or amplifiers. The document discusses the basics of bipolar transistors including their structure, operation, and different configurations (common base, common emitter, common collector). It provides examples of calculating currents and voltages in transistor circuits using characteristics curves and explains how different classes of amplifiers (A, B, AB, C) determine the portion of the input signal cycle during which the transistor is active.
1. The document discusses the principles of operation of p-n junction diodes and their use in analog electronic circuits. It describes how a diode only conducts current in one direction when forward biased and acts as an open switch when reverse biased.
2. Diode clipper circuits are introduced which can clip off portions of an input signal by only allowing the signal to pass through the diode when above or below a certain threshold set by a bias voltage. Parallel and series clipper configurations are examined along with their input-output characteristics.
3. Double-ended clipper circuits are described which can clip both the positive and negative portions of a signal simultaneously using two back-to-back diodes biased to conduct only
The document describes experiments conducted to analyze the characteristics of active band-pass and band-stop filters. Specifically, it discusses plotting the gain-frequency response curves and determining the center frequency, bandwidth, quality factor, and phase shift for both types of filters. Sample computations are provided for an active band-pass filter to calculate the actual voltage gain, expected voltage gain, center frequency, quality factor, and percentage differences between measured and expected values. The objectives, theory, materials used, and procedures for the experiments are also outlined.
Ac analysis of bjt and mosfet inverting amplifiersMahoneyKadir
This document discusses the AC analysis of BJT and MOSFET inverting amplifiers. It begins by stating the lesson objectives which are to draw small signal models, calculate parameters, construct equivalent circuits, and calculate performance characteristics for common-emitter and common-source amplifiers. It then explains the hybrid-pi small signal model of BJTs and defines the transconductance, output resistance, and input resistance. Equivalent circuit models are shown for common-emitter amplifiers and the calculations for voltage gain, input resistance, and output resistance are presented. The small signal parameters for MOSFETs are defined and similar analysis is shown for common-source amplifiers. An example problem is worked through to demonstrate the calculations
The document provides an overview of basic electronics concepts including:
1) Ohm's law defines the relationship between voltage, current, and resistance in circuits.
2) Schematics use symbols to represent circuit elements and show how they are connected.
3) Resistors in series and parallel follow specific rules to calculate total resistance.
4) Capacitors store charge and their behavior changes with frequency based on impedance.
SIGNAL SPECTRA EXPERIMENT 1 - FINALS (for PULA)Sarah Krystelle
The document describes Experiment #1 on a class A power amplifier. It involves determining the operating point (Q-point) on the DC and AC load lines, measuring the voltage gain, maximum undistorted output, and efficiency. The student is to perform steps such as calculating voltages/currents, drawing load lines, measuring gain, and adjusting the emitter resistance to center the Q-point on the AC load line. Objectives include analyzing the amplifier's DC and AC characteristics, measuring linearity and maximum output before clipping occurs.
This document calculates the capacitance and voltage rating required for a capacitor in a circuit. It determines that the capacitance needed is 41 microfarads and the voltage rating required is 744 volts-amperes by calculating the capacitive reactance, capacitance from the reactance formula, and voltage-ampere rating from the voltage and current.
Struggle To Recruit Senior Leaders In InternationalEdith Hamilton
A survey of 61 respondents was conducted regarding challenges in recruiting senior leaders for international charities. Key findings included:
- Respondents were split between those currently working in the charity sector and other sectors.
- The majority of respondents worked in the UK and Ireland, with other regions being Europe, Central/Eastern Europe, Africa, and Asia/Pacific.
- Most organizations had under 250 employees and volunteers.
- Respondents viewed work for an international charity as interesting but had concerns over lower financial compensation compared to other sectors.
Your Brand says everything about who you are. At Davis Events we specialize in upscale events that wow attendees and create lasting impact. That impact is found in the celebration of your Brand Identity and your Social Identity. Building amazing events around these core elements is why we love what we do!
This document discusses electronics topics including conductors, insulators, semiconductors, intrinsic and extrinsic semiconductors, doping, N-type and P-type semiconductors, PN junctions, rectifiers, transistors, operational amplifiers, and logic gates. It provides details on:
- How conductors allow free electron flow while insulators do not, with semiconductors in between.
- The doping process used to create N-type and P-type extrinsic semiconductors.
- How a PN junction forms and its use as a rectifier, allowing current to flow more easily in one direction.
- The basic transistor configuration
This document describes a novel transimpedance amplifier with variable gain. It proposes a new topology using only three active devices and no passive components. Simulations show it achieves comparable noise, bandwidth, and input impedance as a conventional design using 30uW power. Its transimpedance gain can be varied from 68dB to 78dB by adjusting a control voltage, allowing for a 10dB range of programmability. The proposed design occupies less layout space and is well-suited for applications requiring many sensors.
The 2N3773 is a silicon NPN power transistor intended for use in power switching circuits such as relay or solenoid drivers. It has a TO-3 package and can withstand collector currents up to 16 amps and collector-emitter voltages up to 140 volts. Its key electrical characteristics include a forward current gain ranging from 15 to 60 at an collector current of 8 amps.
This document contains 28 multiple choice questions about analog and digital electronics components, specifically focusing on diodes including zener diodes, photodiodes, varactor diodes, light-emitting diodes, tunnel diodes, and optocouplers. The questions cover characteristics, applications, operating principles and parameters of these different types of diodes.
The document discusses the AC analysis of BJT and MOSFET inverting amplifiers. It begins by stating the lesson objectives which are to draw small signal models, calculate parameters, and analyze performance characteristics like voltage gain, input and output resistances. It then discusses the hybrid-pi model of BJTs and defines the transconductance, output resistance and input resistance. Equivalent circuit models are shown for common-emitter and common-source amplifiers using BJTs and MOSFETs. Calculations are presented for voltage gain, input and output resistances of these amplifiers both with and without bypassing the emitter or source resistances. Examples are also worked through.
The document describes a modified Dickson charge pump design that reduces power consumption during input clock transitions. A PMOS transistor is added in series with each capacitor stage to increase the time constant, slowing the charge transfer. This reduces power from 340.5uW to 28.85uW at no load for the Dickson versus modified design. Output voltages are similar but slightly lower for the modified design. At 10MOhm and 40MOhm loads, power savings during transitions are also realized compared to the standard Dickson design while maintaining comparable output voltages. In conclusion, the modified design successfully reduces transition power consumption without significantly impacting output voltage.
This document describes designing and testing a common collector BJT amplifier circuit using voltage divider bias. The circuit specifications, components, and test procedures are outlined. The amplifier is constructed and its frequency response is measured from 10 Hz to 3 MHz. Gain and bandwidth are calculated from the response graph. Input and output impedances are also experimentally determined by varying the input and measuring the output voltage. The theoretical and practical values are compared.
This document discusses diodes and their applications in electronic circuits. It covers ideal and junction diodes, modeling diodes using exponential, piecewise linear, constant voltage and small signal models. It also discusses zener diodes, rectifiers, peak detectors and their usage in limiting and clamping circuits. Various diode circuits including half-wave, full-wave and bridge rectifiers as well as voltage doublers are described.
This document contains 30 multiple choice questions about analog and digital electronics concepts. The questions cover topics like shift registers, sequential circuits, counters, flip-flops, logic gates, memory and more. Sample questions include the number of clock signals needed to shift an 8-bit value out of a register, what determines the next state in a sequential circuit, and examples of cascading counters to implement a divide-by-60 function.
The document is a practice test for electronics containing 65 multiple choice questions. It covers topics such as basic electronic components like resistors, capacitors, diodes, transistors; circuits; electricity; electronics; transformers; and applications of electronics. The questions test knowledge of properties of components, how components function in circuits, Kirchhoff's laws, and concepts in electricity and electronics. An answer key is provided at the end to check responses.
This document discusses capacitors in series and parallel circuits. It provides the objectives of understanding how to calculate the equivalent capacitance of capacitors connected in series and parallel. Formulas are given for calculating the total capacitance of series circuits as 1/CT = 1/C1 + 1/C2 + 1/C3 and of parallel circuits as CT = C1 + C2 + C3. Examples are included to demonstrate solving problems involving up to three capacitors in series or parallel using these formulas. Quizzes with solutions are also provided to help reinforce the concepts.
Operational amplifiers (OP amps) can be used to build various electronic circuits. An ideal OP amp has infinite input impedance and zero output impedance, with infinite open-loop gain. Common configurations include inverting and non-inverting amplifiers, which provide negative and positive feedback respectively to control the closed-loop gain. Other circuits like summers, integrators, and differentiators can be built by exploiting the high input impedance and voltage amplification properties of OP amps. However, practical OP amps have non-ideal characteristics that must be accounted for, such as finite gain bandwidth, input bias currents, and output saturation levels.
Ac analysis of bjt and mosfet voltage followersMahoneyKadir
This document discusses the AC analysis of BJT and MOSFET voltage follower circuits. It defines the objectives as identifying these circuits and calculating their performance characteristics, including voltage gain, input resistance, and output resistance. It then analyzes common-collector (C-C) and common-drain (C-D) amplifier configurations for voltage followers, providing the small-signal equivalent circuits and equations for terminal voltage gain, input resistance, output resistance, and overall voltage gain.
Transistors can be used as switches or amplifiers. The document discusses the basics of bipolar transistors including their structure, operation, and different configurations (common base, common emitter, common collector). It provides examples of calculating currents and voltages in transistor circuits using characteristics curves and explains how different classes of amplifiers (A, B, AB, C) determine the portion of the input signal cycle during which the transistor is active.
1. The document discusses the principles of operation of p-n junction diodes and their use in analog electronic circuits. It describes how a diode only conducts current in one direction when forward biased and acts as an open switch when reverse biased.
2. Diode clipper circuits are introduced which can clip off portions of an input signal by only allowing the signal to pass through the diode when above or below a certain threshold set by a bias voltage. Parallel and series clipper configurations are examined along with their input-output characteristics.
3. Double-ended clipper circuits are described which can clip both the positive and negative portions of a signal simultaneously using two back-to-back diodes biased to conduct only
The document describes experiments conducted to analyze the characteristics of active band-pass and band-stop filters. Specifically, it discusses plotting the gain-frequency response curves and determining the center frequency, bandwidth, quality factor, and phase shift for both types of filters. Sample computations are provided for an active band-pass filter to calculate the actual voltage gain, expected voltage gain, center frequency, quality factor, and percentage differences between measured and expected values. The objectives, theory, materials used, and procedures for the experiments are also outlined.
Ac analysis of bjt and mosfet inverting amplifiersMahoneyKadir
This document discusses the AC analysis of BJT and MOSFET inverting amplifiers. It begins by stating the lesson objectives which are to draw small signal models, calculate parameters, construct equivalent circuits, and calculate performance characteristics for common-emitter and common-source amplifiers. It then explains the hybrid-pi small signal model of BJTs and defines the transconductance, output resistance, and input resistance. Equivalent circuit models are shown for common-emitter amplifiers and the calculations for voltage gain, input resistance, and output resistance are presented. The small signal parameters for MOSFETs are defined and similar analysis is shown for common-source amplifiers. An example problem is worked through to demonstrate the calculations
The document provides an overview of basic electronics concepts including:
1) Ohm's law defines the relationship between voltage, current, and resistance in circuits.
2) Schematics use symbols to represent circuit elements and show how they are connected.
3) Resistors in series and parallel follow specific rules to calculate total resistance.
4) Capacitors store charge and their behavior changes with frequency based on impedance.
SIGNAL SPECTRA EXPERIMENT 1 - FINALS (for PULA)Sarah Krystelle
The document describes Experiment #1 on a class A power amplifier. It involves determining the operating point (Q-point) on the DC and AC load lines, measuring the voltage gain, maximum undistorted output, and efficiency. The student is to perform steps such as calculating voltages/currents, drawing load lines, measuring gain, and adjusting the emitter resistance to center the Q-point on the AC load line. Objectives include analyzing the amplifier's DC and AC characteristics, measuring linearity and maximum output before clipping occurs.
This document calculates the capacitance and voltage rating required for a capacitor in a circuit. It determines that the capacitance needed is 41 microfarads and the voltage rating required is 744 volts-amperes by calculating the capacitive reactance, capacitance from the reactance formula, and voltage-ampere rating from the voltage and current.
Struggle To Recruit Senior Leaders In InternationalEdith Hamilton
A survey of 61 respondents was conducted regarding challenges in recruiting senior leaders for international charities. Key findings included:
- Respondents were split between those currently working in the charity sector and other sectors.
- The majority of respondents worked in the UK and Ireland, with other regions being Europe, Central/Eastern Europe, Africa, and Asia/Pacific.
- Most organizations had under 250 employees and volunteers.
- Respondents viewed work for an international charity as interesting but had concerns over lower financial compensation compared to other sectors.
Your Brand says everything about who you are. At Davis Events we specialize in upscale events that wow attendees and create lasting impact. That impact is found in the celebration of your Brand Identity and your Social Identity. Building amazing events around these core elements is why we love what we do!
Thomas and his family took a trip to Charleston, South Carolina. They visited Fort Sumter, traveling there by boat. At Fort Sumter, a park ranger gave an informative talk about the history of the fort. They also saw an aircraft carrier and visited the aquarium, seeing sharks, turtles, otters, and alligators. Thomas had an educational and fun family trip learning about history and marine life in Charleston.
The document discusses five key success factors for software development organizations: technology talent, product positioning, roadmap, architecture/design, and development process. It notes that research and development teams often take an "inside out" view of technology while business teams view it from the "outside in." The solution is for R&D leaders to understand the business perspective and work on the five keys from both views. Project approaches described include a needs assessment, end-to-end optimization over months, and working as a virtual CTO.
The document discusses using tokens instead of regular expressions to parse code. It provides an example of tokenizing a PHP code snippet and extracting variable names. The author argues that a tokenizer approach is better than regex for understanding context and structure in code.
ACG Presentation Little America, Salt Lake City 8 Jun2010Jeff Davis
The document discusses how businesses need to evolve and adapt to changing economic conditions. It notes that the recession will not last forever but the economy will not return to normal, and organizations need to be responsive to change. Examples are given of how large companies like P&G and GM are adapting to globalization and new technologies like social media. The key message is that organizations should not get discouraged by economic challenges but should get motivated to change and adapt in order to survive.
This document provides lessons learned for startups. Some key points include:
1) Founders must balance deep belief in their project with a willingness to doubt assumptions and data.
2) Small teams have an advantage in focusing tightly on a target to differentiate themselves, rather than trying to be better than others.
3) Cash flow is more important than revenue, as payroll cannot be met with revenue alone.
4) Different roles have different priorities depending on the startup stage, from concept to growth. Collaboration is important while understanding position responsibilities.
This document discusses how social projects can change communities through collective online action. It outlines some of the barriers to change like bureaucracy and lack of funding or coordination. A proposed solution is a web-based platform that allows people to identify, fund, and deliver local social projects in a transparent, simple and agile manner. Examples of projects could include improving school equipment, parks, or adding trees to streets. The platform would facilitate the entire social project cycle from planning to delivery and evaluation. It aims to bypass traditional barriers and fund community change one project at a time.
Atividades de inglês (interfaces Língua Portuguesa e Matemática)Natan Campos
The document provides suggested activities for an English language class that interface with Portuguese language skills for 9th grade students. The activities include reading three plot summaries of the SpongeBob SquarePants television show from IMDB and comparing them to identify which include certain details. Students also analyze the use of punctuation in a phrase from the summaries. Finally, students read a short news article about protests in Brazil during the Confederations Cup and answer comprehension questions about it. The activities aim to develop English language skills while addressing descriptors from the Portuguese language curriculum around locating explicit and implicit information in texts, comparing texts on the same topic, and recognizing effects of punctuation.
The document discusses various processes of word formation in English including derivation, compounding, conversion, and quantitative changes. It provides examples of common suffixes and prefixes used in derivation to form new words. It also describes compounding, conversion of words between parts of speech, and quantitative changes like clipping, blending, and abbreviations.
Réseaux Sociaux : Quand le marketing et la DSI partagent leurs expériences. Marie_Estager
La DSI et le marketing font aujourd’hui face à une donne totalement nouvelle. Car utiliser à bon escient les réseaux sociaux requiert un subtil dosage d’expertise technique et de savoir-faire en matière de relation client. via Premium le magazine de CSC
Avec cette présentation, l'agence Internet WEBQAM vous dévoile les meilleures pratiques pour créer des jeux concours tout en respectant les règles de la plateforme Facebook ainsi que la réglementation française en vigueur.
Inscrivez-vous dès aujourd'hui sur www.bewily.com pour recevoir avant tout le monde une invitation lors du lancement de la plateforme de créations d'applications et de jeux concours Bewily.com.
Une fois la plateforme Saas Bewily accessible au public, vous pourrez alors créer des applications emarketing (Jeux concours, Quiz, Concours avec votes, Blind test musical, Concours photo, Mini site internet, Encart publicitaire) et les intégrer en tant qu'onglet sur votre page Facebook.
Intégrez également vos créations en tant que widget sur votre site internet.
Avec Bewily, faites grandir votre communauté et offrez une expérience utilisateur unique et enrichie.
Collectez-les statistiques de participation, visualisez-les en ligne et enrichissez votre fichier client pour des actions marketing ciblées et efficaces.
Rendez-vous sur Bewily.com pour vous inscrire.
Vous êtes une agence ? Vous êtes développeur Freelance ? Vous créez des applications emarketing et des jeux concours pour vos clients ? Découvrez la plateforme d'éditions d'applications Bewily et contactez l'agence Internet WEBQAM pour obtenir un accès privilégié au service.
This document contains a sample exam for a Malaysian radio amateur examination, with 53 multiple choice questions testing knowledge of radio communication fundamentals. The questions cover topics like radio station definitions, amateur radio license classes and privileges, electrical formulas, components of radio transmitters and receivers, and safety considerations. The exam is intended to evaluate if applicants have sufficient technical skills and knowledge of radio operation to be licensed as amateur radio operators.
Exam 086044RR - Modulation and Detection CircuitsWhen you.docxSANSKAR20
Exam: 086044RR - Modulation and Detection Circuits
When you have completed your exam and reviewed your answers, click Submit Exam. Answers will not be recorded until you
hit Submit Exam. If you need to exit before completing the exam, click Cancel Exam.
Questions 1 to 25: Select the best answer to each question. Note that a question and its answers may be split across a page
break, so be sure that you have seen the entire question and all the answers before choosing an answer.
R
MAA/V—
f =600 kHz
C -0.000352
L =200 £iH
R=101A
1. Look at the circuit shown in the figure above. The frequency of the power supply is 600 kHz, the
capacitance of C is 0.000352 jiF the inductance of L is 200 |aH, and the resistance of R is 10 Q. What
would be the calculated effective resistance (RJ of this circuit?
A. 56,818 fi
B. 52,119 Q
C. 10,461 n
D. 43,167 n
2. An unmodulated carrier has an amplitude of 5 V. When modulated, the maximum amplitude is 10 V.
What is the modulation percentage?
A. 50 percent
B. 120 percent
C. 30 percent
D. 100 percent
3. In a standard AM transmission with 100 percent modulation,
A. the sideband amplitude is 70.7 percent of the carrier amplitude.
B. the sideband amplitude is one-eighth of the carrier amplitude.
C. the sideband amplitude is one-fourth of the carrier amplitude.
D. the sideband amplitude is 50 percent of the carrier amplitude.
^A/Wsr-
f =600 kHz
C =0,000352 fiF
L=20QmH
R=ioy?
4. For the circuit shown in the figure above, what would be the calculated value of the inductive reactance
(Xj)? (Round your answer to the nearest whole number.)
A. 942 D.
B. 1,057 a
C. 754 a
D. 598 a
5. A 1.5 MHz carrier frequency is amplitude-modulated by a 200 kHz sinewave audio signal. The
bandwidth would be
A. 4,000 kHz.
B. 400 kHz.
C. 405 kHz.
D. 40 kHz.
6 . modulation is particularly adaptable to computer systems, data transmission, and space
communications.
A. Pulse-amplistude
B. Pulse-position
C. Phase
D. Pulse
7. Some methods of pulse modulation provide for transmission of a number of channels on a single carrier.
That is accomplished by dividing the transmission time among the several channels, which is called
A. damping.
B. multiplexing.
C. frequency-shift keying.
D. duplexing.
8. A 1,200 kHz RF carrier is amplitude-modulated by a 500 Hz sinewave audio signal. The upper sideband
frequency would be
A. 1,195 kHz.
B. 1,205 kHz.
C. 120.5 kHz.
D. 1,200.5 kHz.
9. In a Foster-Seeley phase shift discriminator, certain voltage conditions depend on whether the input
signal is at, above, or below resonance. Look at the vector diagram shown in the figure above. Which of
the following statements correctly describes the circuit represented by this vector diagram?
A. The input signal in this circuit is at resonance, and the discriminator's secondary voltages cancel each other.
B. The input signal is above resonance, and no output signal will be produced.
C. The output signal produced will be directly ...
1. The document contains 26 multiple choice questions related to physics concepts like radioactivity, electronics, electricity and magnetism.
2. The questions cover topics such as half-life calculations, properties of p-n junctions, logic gates, electric fields, resistance and capacitance, induction and mutual inductance.
3. For each question, 4 possible choices are given as answers and the test taker must select the correct choice.
model question on engineering assistants air and dd with answersSudhir Kumar
The document contains 74 multiple choice questions and answers about engineering topics such as transistors, diodes, semiconductors, logic gates, photoelectric cells, and magnetic fields. The questions test fundamental concepts like the transfer ratio of a transistor, the cause of the potential barrier in a p-n diode, how applying forward bias affects the width of the potential barrier, what constitutes a depletion layer, and which materials act as impurities to make silicon n-type or p-type. Other questions cover topics like the conductivity and resistivity of semiconductors at different temperatures, the output of OR gates, factors that determine the photo-electromotive force in a photo cell, and applications of Zener diodes. The
Exam 387017RR - Resonant CircuitsWhen you have completed .docxSANSKAR20
Exam: 387017RR - Resonant Circuits
When you have completed your exam and reviewed your answers, click Submit Exam. Answers will not be recorded until you
hit Submit Exam. If you need to exit before completing the exam, click Cancel Exam.
Questions 1 to 20: Select the best answer to each question. Note that a question and its answers may be split across a page
break, so be sure that you have seen the entire question and all the answers before choosing an answer.
1. In the circuit shown, if the value of the reactive component was increased, how would it change the
waveforms?
A. The phase shift between the current and the voltage would increase.
B. The phase shift between the current and the voltage would reverse.
C. The phase shift between the current and the voltage would decrease.
D. The phase shift between the current and the voltage would remain the same.
2. Look at the phasor diagram and the circuit shown. The diagram shows the impedances for the
components in the circuit. What is the total impedance of the circuit?
Voltage
R = 300n
(A) (B)
A. 85 a
B. 500 £2
C.100O
D. 50 a
A-
100V
B
100V^
100V
D
3. In the circuit above, if you placed meter leads between points A and D, what voltage would you
measure?
A.300 V
B. 100 V
C.0V
0. 141 V
4. A parallel-tuned circuit is found to have insufficient bandwidth. You can increase the bandwidth of the
circuit by
A. increasing circuit resistance.
B. using the conjugate impedance.
C. adding resistance in parallel.
D. increasing the £"2.
5. Look at this graph of current and voltage phase relationships. The circuit that produces the illustrated
current and voltage phase relationships would be
A. inductive with some resistance.
B. purely inductive.
C. purely capacitive.
D. capacitive with some resistance.
B. 1.5.
C. 30.3.
D. 45.5.
Circuits Circuit 4
7. Look at the four circuit diagrams shown. Technician A says that Circuit 3 is a low-pass circuit, and that
Circuit 4 is a high-pass circuit. Technician B says that Circuit 1 is a band-pass circuit, and that Circuit 2 is a
band-reject circuit. Which of the following statements is correct?
A. Both technicians are correct.
B. Only Technician A is correct.
C. Only Technician B is correct.
D. Neither of the two technicians is correct.
Curve 1 Curve 2
8. Two electronics technicians are looking at the characteristic curves shown. Technician A say that Curve
1 is the curve for a low-pass circuit, and that Curve 2 is the curve for a high-pass circuit. Technician B says
that Curve 3 is the curve for a band-pass circuit, and that Curve 4 is the curve for a band-reject circuit.
Which of the following statements is correct?
A. Both technicians are correct.
B. Only Technician B is correct.
C. Neither of the two technicians is correct.
D. Only Technician A is correct.
A
100V
B
100V
c
100V
D—
Voltage
Voltage
Voltage
Current
Current
Waveform 3 Waveform 4
9. In the circuit shown, the generator Irequency is raised ...
This document contains an unsolved past paper for the GATE electrical engineering exam from 2004. It includes 46 multiple choice questions testing concepts in electrical circuits, electronics, electric machines, power systems and measurements. The questions cover topics such as parallel resonance, capacitors, inductors, transformers, motors, power supplies, and more.
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1. Paper: BEL Placement Paper (Technical-Electronics-IInd)
1. Resistivity of silicon in ohms cm. is approx. equal to
a. 50 b. 1012 c. 230k d. 10-6
2. Rsistivity ofGermanium in ohms cm. is approx. equal to
a. 50 b. 10-12 c. 50k d. 10-6
3. The number of free electrons/cubic cm intrinsic Germanium at room temperature is approx.
equal to
a. 1.5*1010 b. 2.5*1013 c. 1000 d. 5*106
4. The number of free electrons/cubic cm of intrinsic silicon at room temperature is approx.
equal to
a. 1.5*1010 b. 2.5*1013 c. 10000 d. 5*106
5. The forbidden energy gap for silicon is
a. 1.1eV b. 067eV c. 0.97eV d. 1.7eV
6. The forbidden energy gap for Germanium is
a. 1.1eV b. 067eV c. 0.97eV d. 1.7eV
7. N type material is formed by the addition of the following (penta valent )atom in n to
semiconductor material
a. Antimony
b. Arsenic
c. Phosphorous
d. Any of the above
8. P type material is formed by the addition of the following [Trivalent] atom tn to
semiconductor material
a. Boron b. Gallium c. Indium d. Any of the above
9. Impurity atoms that produces N type material by its addition in semiconductor is called
2. a. Donar b. Acceptor c. Conductor d. Insulator
10. Impurity atoms that produces P type material by its addition in semiconductor is called
a. Donar b. Acceptor c. Conductor d. Insulator
11. Dynamic resistance of a diode Rd is if voltage changes is DVd and the current change is D Id
a. D Vd / D Id
b. D Id / D Vd
c. 1 / DVd
d. 1 / D Id
12. Point contact diodes are preferred at very high frequency, because of its low junction
a. Capacitance and inductance
b. Inductance
c. Capacitance
13. Identify the circuit given below
a. AND gate
b. OR gate
c. Rectifier
d. NOR gate
14. Identify the circuit given below
a. AND gate
b. OR gate
c. Rectifier
d. NOR gate
15. DC value of a Half wave rectifier with Em as the peak value of the input is
3. a. 0.318Em
b. 0.418Em
c. 0.518Em
d. 0.618Em
16. Change in Zener voltage of 10V at 100o C if temperature co-efficient is 0.072%o C as
a. 0.54 V b. 0.74 V c. 0.64 V d. 0.14 V
17. If Tc is th e% temperature co of / oC and Vz as zener voltage and T as change in temperature
then the change in zener voltage is
a.
b.
c. 100. Vz. Tc DT
d. None of these of the above
18. PIV for a full wave rectifier, if Em is the peak voltage is
a. Em b. 1.5Em c. 0.636Em d. 2Em
19. Schottky Barrier diodes becomes important at
a. DC level operation
b. Low frequency operation
c. High frequency operation
d. None of these
20. Clamping network is the one that will clamp the signal to a
a. Different peak value
b. Different DC level
c. Different polarity level
d. Different RMS level
4. 21. Clipping network is the one that will clip a portion of the
a. Input signal without distorting the remaining portion
b. Input signal with distorting the remaining portion
c. Any of the above
d. None of these
22. Transition capacitance Ct of a Varicap diode with Knee voltage Vt, reverse voltage Vr and
K, the constant based on semiconductor material and the construction technique & N dependent
on type of junction is given by
a. 1 / K (Vt + Vr)N/2
b. 1 / K (Vt + Vr)N
c. K / (Vt + Vr)N
d. K / (Vt + Vr)1/N
23. Ct = K / (Vt + Vr)N where Vt Knee voltage, Vr reverse voltage, K manufacturing dependent
constant and N dependent on type of junction, for alloy junction the value of N is
a. 1/3 b. 2/3 c. 1/2 d. 1/4
24. Ct = K / (Vt + Vr)N where Vt Knee voltage, Vr reverse voltage, K manufacturing dependent
constant and N dependent on type of junction, for diffused junction the value of N is
a. 1/3 b. 2/3 c. 1/2 d. 1/4
25. In JFET, the drain current Id is given by (Idss drain – source saturation current Vgs – Gate –
source voltage, Vp the pinch off voltage)
a. Idss[1 – Vp/Vgs]
b. Idss(1 – Vgs/Vp)2
c. Idss[1 – Vgs/Vp)
d. Idss(1 – Vgs/Vp)3/2
26. The shadow mask in colour tube is used to
5. a. Reduce X-Ray emission
b. Ensure each beam hits its own dots
c. Increase screen brightness
d. Provide degaussing for the screen
27. Indicate which of the following signal is not transmitted in colour TV
a. Y b. Q c. R d. I
28. Another name for horizontal retrace in TV receiver is the
a. Ringing b. Burst c. Damper d. Fly back
29. Another name for the colour sync in the colour TV system
a. Ringing b. Burst c. Damper d. Fly back
30. The HV anode supply for a picture tube of a TV receiver is generated in the
a. Mains transformer
b. Vertical output stage
c. Horizontal output stage
d. Horizontal oscillator
31. The output of vertical amplifier is
a. Direct current
b. Amplified vertical sync pulse
c. A saw tooth voltage
d. A saw tooth current
32. In a transistor if Alpha = 0.98, current gain is equal to
a. 29 b. 59 c. 69 d. 49
33. The active region in the common emitter configuration means
6. a. Both collector and emitter junction is reverse biased
b. The collector junction is forward biased and emitter junction
c. The collector junction is reverse biased and emitter junction is forwared biased
d. Both collector & emitter junction are forward biased
34. The saturation region in the common emitter configuration means that
a. Both collector & emitter junction are reverse biased
b. The collector junction is forward biased and emitter junction
c. The collector junction is reverse biased and emitter junction is forwared biased
d. Both collector & emitter junction are forward biased
35. The % of Red, Green & Blue in 100% White Y is given by
a. 30%, 59%, 11%
b. 50%, 30%, 11%
c. 30%, 11%, 50%
d. 33.3%, 33.5%, 38.3%
36. Equalizing pulse width, if H is the Horizontal sync rate
a. 0.64 H b. 0.07 H c. 0.04 H d. 0.16 H
37. In a simple RC network the bandwidth is equal to
a. 1/2 p RC
b. RC / 2
c. 2 C / p R
d. 2 p / RC
38. The time constant of a RC network is given by
a. RC b. C/R c. R/C d. None of these
7. 39. First zero crossing of pulse frequency spectrum occurs at if d is the pulse width, T is the
pulse repetition rate
a. 1/d b. d/T c. T/d d. T
40. The distortion less output characteristic of a network means
a. Constant amplitude and linear phase shift over frequency
b. Linear phase shift and amplitude need not be constant
c. Any amplitude and phase
d. None of these
41. Single sideband means suppressed
a. Carrier
b. Carrier and one side band
c. One side band
d. None of these
42. In an amplitude modulated signal, lower side band frequency is equal to (if the carrier
frequency is fc and modulation frequency is fm)
a. fm + fc b. fc – fm c. fm r fc d. fc / fm
43. Modulation index of the frequency modulation depends on
a. Amplitude & frequency of the modulation signal
b. Frequency and amplitude of carrier signal
c. Carrier frequency
d. None of these
44. The BW of the narrow band FM if modulating frequency is fm
a. 3 r fm b. 2 r fm c. 2.5 r fm d. 10 r fm
45. Reactance tube modulator is known for
8. a. FM b. AM c. PPM d. PAM
46. Bandwidth and rise time product is
a. 0.35 b. 0.45 c. 0.30 d. 0.49
47. Energy gap, Lg, for Germanium at room temp [300o K] is
a. 0.72eV b. 1.1eV c. 1.53eV d. 0.2eV
48. Volt equivalent of temperature VT, at 116o K is
a. 0.11V b. 0.01V c. 1.16V d. 0.1V
49. Reverse saturation current of a Ge.diode is in the range of
a. mA b. uA c. nA d. pA
50. Cut-in voltage V for silicon is approximately
a. 0.2V b. 0.6V c. 0.9V d. 1.1V
51. Every 10o C rise in temp. the reverse saturation current
a. Doubles
b. Halves
c. Triples
d. No change
52. Hall effect with reference to Metal or Semiconductor carrying a current I is placed in a
transverse magnetic field B, an electric field E is induced in
a. Parallel to B
b. Perpendicular to I
c. Perpendicular to both B & I
d. Perpendicular to B
53. 1 eV (electron volt) is equal to:
a. 1.9 r 10-20 J
9. b. 1.6 r 10-19 J
c. 1.6 r 10-20 J
d. 1.16 r 10-19 J
54. Donar impurity is having a valency of:
a. 2 b. 3 c. 4 d. 5
55. Acceptor impurity is having a valency of
a. 2 b. 3 c. 4 d. 5
56. Electron volt arises from the fact that if any electron falls through a potential of 1 volt, its
kinetic energy will
a. Decrease, & potential energy will increase
b. Increase & potential energy decrease
c. Be unaltered & potential energy decreases
d. Increase & potential energy increase
57. Hole is created in a semiconductor material if one of following impurities are added
a. Antimony
b. Arsenic
c. Indium
d. Phosphorus
58. Excess electron is created by
a. Boran
b. Gallium
c. Indium
d. Arsenic
10. 59. A snubber circuit is used across the SCR to protect against
a. The di/dt of the anode current
b. The dv/dt turn on
c. L.di/dt of load inductance
d. None of these
60. Germanium has the valency of
a. 2 b. 3 c. 4 d. 5
61. Silicon has the valency of
a. 2 b. 3 c. 4 d. 5
62. Hole acts as a free charge carrier of polarity
a. Negative
b. Positive
c. Neutral
d. None of these
63. Burst signal in NTSC system is 8 cycles of the frequency of
a. Colour sub carrier
b. Picture carrier
c. Sound carrier
d. None of these
64. Colour sub carrier reference burst is superimposed on the
a. Back porch of the each horizontal sync pulse
b. Front porch of the each horizontal sync pulse
c. Front porch of the each vertical sync pulse
11. d. Back porch of the each vertical sync pulse
65. The law of mass action with reference to semiconductor technology states that the product of
free negative & positive concentration is a constant and
a. Independent of amount of donor and acceptor doping
b. Dependent on amount of donor and independent of the amount acceptor impurity doping
c. Depend on amount of both donor & acceptor impurity doping
d. None of these
66. The snubber circuit used across SCR is a simple
a. R-L network
b. RLC network
c. LC network
d. RC network
67. To limit the rate of rise of SCR anode current a small
a. Inductor is inserted in cathode circuit
b. Inductor is inserted in anode circuit
c. Capacitor is inserted in anode circuit
d. Capacitor is inserted in cathode circuit
68. Torque developed by a DC servo motor is proportional to the
a. Product of power and time
b. Product of armature current and back emf
c. Armature voltage and armature current
d. Field voltage and field current
69. Proportional Integral control
a. Reduces steady state error but reduces the forward gain
12. b. Increases the forward gain and reduces the steady state error
c. Increases the steady state error and increases the forward gain
d. None of these
70. Increasing the servo bandwidth:
a. Improves signal to noise ratio
b. Improves speed response and lowers signal to noise ratio
c. Improves power output
d. None of these
71. Notch filter is
a. Low pass filter
b. High pass filter
c. Narrow stop band filter
d. Narrow pass band filter
72. In TV Receivers the Electron beam deflection method used is
a. Electro static
b. Electro magnetic
c. Magnetic
d. All the above
73. In a line of sight communication the maximum range R in miles between the receiver
antenna and transmitter antenna of height H in feet is approximately
a. R = 1.93 ÖH
b. R = 1.23 ÖH
c. R = 1.53 ÖH
13. d. R = 2.03 ÖH
74. In wavelength of the 60 MHz carrier frequency is
a. 10 metres
b. 15 metres
c. 5 metres
d. 2.5 metres
75. In standard TV receiving antenna the dipole element is
a. 0.5 of the wave length
b. 0.25 of the wave length
c. 1.5 of the wave length
d. 1.0 of the wave length
76. The characteristics of FET are similar to:
a. Triode
b. Tertode
c. Pentode
d. Diode
77. Charge coupled device is an array of capacitors whose structure is similar to:
a. Shift register
b. Flip-flop
c. NAND gate
d. Amplifier
78. Operational amplifier characteristics are which of the following:
a. Infinite gain
14. b. Infinite input impedance
c. Output impedance is zero
d. All of the above
79. The typical value of the open loop gain in dB of an amplifier at DC with no feedback is:
a. 90 to 100
b. 80 to 90
c. 0 to 50
d. 50 to 70
80. The 3 dB band width means the frequency at which
a. The open loop voltage gain reduced to 0.707
b. The open loop gain reduced to unity
c. Maximum voltage of a signal is without distortion
d. It is a medium wave band width of radio receiver
81. Rise time of an amplifier is defined as time required
a. To change from 0 to 100 % of its final value
b. To change from 0 to 50 % of its final value
c. To change from 10 to 90 % of its final value
d. To change from 10 to 100 % of its final value
82. High speed amplifier design emphasized on
a. Extremely small bandwidth
b. Very slow response
c. Unity gain bandwidth after 10 MHz
d. None of these
15. 83. Tuned amplifier having the frequency range between
a. 150 KHz – 50 MHz
b. 100 Hz – 100 KHz
c. 100 KHz – 120 KHz
d. 50 MHz – 100 MHz
84. The resonance frequency of a tuned circuit made up of R, L, C is given by
a. 1/2 pÖLC
b. 2 pÖLC
c. 2 p / ÖLC
d. ÖLC / 2
85. The voltage follower can be obtained using operational amplifier
a. Without any feedback
b. Series parallel feedback of unity
c. Parallel feedback
d. Series feedback
86. Fidelity of the amplifier is when
a. It is a linear amplifier
b. It does not add or subtract any spectral components
c. It amplifier each component by the same amount
d. All of the above
87. What would be the output when two input sine waves of frequency 50 KHz and 100 KHz
passed through an amplifier in the medium signal
a. 50 KHz and 100 KHz
b. 100 KHz and 200 KHz
16. c. 50 KHz and 150 KHz
d. All of the above
88. The important application of Schmitt trigger is
a. To convert slowly varying input voltage to abrupt voltage change
b. To convert abruptly varying input voltage into slowly varying output
c. To change the frequency of the input
d. None of these
89. Meaning of decoding is
a. Binary addition
b. Data transmission
c. Demultiplexing
d. Storage of binary information
90. Approximately how many number of gates are incorporated in SSL chip
a. 12
b. 100
c. Excess of 100
d. Excess of 1000
91. The circuit diagram represents which one of the following
a. Half adder
b. Full adder
c. Exor gate
d. AND gate
92. Flip flop cannot be called as
17. a. Bistable multivibrator
b. 1 Bit memory unit
c. latch
d. combinational circuit
93. The important use of low pass filter in power supply is
a. To get the regulation in the output voltage
b. To filter out the ripple frequency
c. To increase the current rating
d. To convert AC into DC
94. Binary equivalent of the decimal number 145 is
a. 10010001
b. 1001011
c. 1010001
d. 1100010
95. In which of the following gate the output will be high when all the maintained at high level
a. NOR
b. AND
c. NAND
d. EXOR
96. Which of the following definition is true in the De Morgan’s theorem
a. Multiplication symbols are replaced by addition symbol
b. Addition symbols are replaced by Multiplication symbol
c. Each of the terms are expressed in the complementary form
18. d. All of the above
97. 8421/BCD code fro a decimal number 149 is
a. 0001 0100 1001
b. 10010101
c. 10101001
d. None of these
98. Combinational circuit are mainly characterized by
a. Output depends upon the previous state & presents state
b. Output depends upon the input at that particular instant
c. Output depends upon the presents state & the clock state
d. Output does not depends upon the input at all
99. A flip flop is defined as
a. A bistable device with two complementary outputs
b. It is memory element
c. It will respond to input and it is a basic memory element
d. All of the above
100. Four bit code is called
a. Nibble
b. Byte
c. Word
d. Register
Answer:-
19. 1. c
2. a
3. a
4. b
5. a
6. b
7. d
8. d
9. a
10. b
11. a
12. c
13. b
14. a
15. a
16. a
17. a
18. d
19. c
20. b
21. a
22. c
23. c
20. 24. a
25. b
26. b
27. c
28. d
29. b
30. c
31. d
32. d
33. c
34. d
35. a
36. c
37. a
38. d
39. a
40. a
41. b
42. b
43. a
44. b
45. b
46. a
21. 47. a
48. b
49. b
50. b
51. a
52. c
53. b
54. b
55. b
56. b
57. c
58. d
59. b
60. c
61. c
62. b
63. a
64. a
65. a
66. d
67. b
68. b
69. a
22. 70. b
71. c
72. c
73. b
74. c
75. a
76. c
77. a
78. d
79. d
80. a
81. c
82. c
83. a
84. a
85. b
86. d
87. a
88. a
89. c
90. a
91. a
92. d