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This document contains 7 problems related to electromagnetic fields and Maxwell's equations. The problems cover topics like calculating inductance of solenoids and toroids when their dimensions change, determining the torque on loops in magnetic fields, calculating self and mutual inductances of coils, and finding the energy stored in an inductor. Detailed solutions are provided for each problem involving the application of relevant equations and substitution of given values.

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Magnetostatic fields

This document discusses magnetostatic fields and laws governing magnetic fields produced by electric currents, including Biot-Savart's law stating that the magnetic field produced by a current element is proportional to the current and inversely proportional to the distance from the element. It also covers Ampere's circuit law relating magnetic fields to their sources, applications of this law to infinite line and sheet currents, magnetic flux density as defined by Maxwell's equations, and magnetic forces.

3.bipolar junction transistor (bjt)

Bipolar junction transistors (BJTs) are three-terminal semiconductor devices consisting of two pn junctions. There are two types, NPN and PNP, depending on the order of doping. BJTs can operate as amplifiers and switches by controlling the flow of majority charge carriers through the base terminal. Proper biasing is required to operate the transistor in its active region between cutoff and saturation. Common configurations include common-base, common-emitter, and common-collector, each with different input and output characteristics. Maximum ratings like power dissipation and voltages must be considered for circuit design and temperature derating.

TRANSISTORS

The document discusses the history and operation of transistors, beginning with the point-contact transistor invented in 1947 by Bardeen, Brattain, and Shockley at Bell Labs. It then covers the basic structure and types of bipolar junction transistors, including NPN and PNP, as well as their operating regions and usage as switches and amplifiers. New developments in transistor technology include 3D transistors using tri-gate designs for improved power efficiency and performance.

ELECTROMAGNETIC FIELDS

This document provides an introduction to electromagnetic fields. It discusses the electromagnetic model and different approaches to developing scientific theories, including the inductive and deductive approaches. Key topics covered include:
- The differences between circuit theory and field theory in electromagnetic analysis.
- An overview of the basic quantities in electromagnetic models, including electric charges, electric field intensity, magnetic flux density, and others.
- Definitions of source quantities like electric charge, current density, and field quantities like the electric and magnetic fields.
- Explanations of important field quantities like the electric field intensity vector E and magnetic field intensity vector H.

A.c circuits

1) Effective current in an AC circuit is 0.707 times the maximum current. Effective voltage is 0.707 times the maximum voltage.
2) Inductive reactance is directly proportional to frequency and inductance. Capacitive reactance is inversely proportional to frequency and capacitance.
3) Impedance is the total opposition to current flow in an AC circuit consisting of resistance and reactance. Power is consumed only by the resistive component of impedance and is proportional to the cosine of the phase angle.

Magnetic hall effect based sensors final

The document discusses magnetic-Hall effect based sensors and provides details on Hall effect principles and applications. It describes how the Hall effect produces a voltage difference when a conductor carrying a current is placed in a magnetic field. It then discusses typical Hall sensor shapes and applications, Hall voltage equations, and the Hall coefficient. The document also provides examples of Hall effect magnetic sensors and switches, describing features and benefits.

Transmission lines

Transmission lines are physical connections between two locations that transmit electromagnetic waves. They have characteristic parameters including resistance, inductance, capacitance, and conductance per unit length. These parameters depend on the line's geometry and materials. Transmission line equations relate the voltage and current at each point on the line based on these parameters. A line has a characteristic impedance that is the ratio of voltage to current. Reflection and transmission of waves occurs at impedance discontinuities like at the load. Lossless lines propagate waves without attenuation, while finite lines are analyzed using reflection coefficients at the generator and load terminations.

Hybrid Parameter in BJT

The document discusses the hybrid or h-parameters model of bipolar junction transistors. It provides notations and equations for the key h-parameters, including input impedance (h11), forward current gain (h21), reverse voltage transfer ratio (h12), and output admittance (h22). It also describes how to calculate the h-parameters from transistor static characteristics and the advantages of the h-parameter model for circuit analysis and design.

[Electricity and Magnetism] Electrodynamics

We discussed extensively the electromagnetism course for an engineering 1st year class. This is also useful for ‘hons’ and ‘pass’ Physics students.
This was a course I delivered to engineering first years, around 9th November 2009. I added all the diagrams and many explanations only now; 21-23 Aug 2015.
Next; Lectures on ‘electromagnetic waves’ and ‘Oscillations and Waves’. You can write me at g6pontiac@gmail.com or visit my website at http://mdashf.org

Magnetic sensors

The document discusses different types of sensors including resistive, capacitive, piezoelectric, magnetic, and strain gauge sensors. It provides details on resistive sensors and their major types like potentiometers, strain gauges, thermistors, and light dependent resistors. The document also describes capacitive sensors, piezoelectric transducers, magnetic sensors like Hall effect sensors, and variable reluctance sensors. Finally, it covers strain gauge sensors, their working, and applications.

Application of diode

A diode is a two-terminal electronic component that allows current to flow in only one direction. It is used to convert alternating current to direct current through a process called rectification. Diodes come in various types including laser diodes, light emitting diodes, Zener diodes, and silicon diodes. Rectification uses diodes to convert AC to DC through either half-wave or full-wave rectification circuits. Zener diodes are used in the reverse bias mode as voltage regulators. Photodiodes generate current or voltage when illuminated by light and are used in applications like machine vision, range finding, and medical diagnostics.

Chap6 photodetectors

The document discusses photodetectors and the principles of p-n junction photodiodes. It describes the depletion region of a reverse biased p-n junction and how electron-hole pairs generated by photons are separated by the electric field. It also discusses pin photodiodes and how their intrinsic region allows for higher quantum efficiency and modulation frequencies compared to p-n junction photodiodes. Absorption coefficients of various semiconductor materials are shown as well as how direct and indirect bandgap materials differ in photon absorption.

Continiuty Equation

The continuity equation describes the distribution of electrons and holes in a semiconductor when there is generation, recombination, and carrier movement. It states that the rate of change of carriers inside the semiconductor equals the rate entering minus the rate leaving, plus the rate of generation minus the rate of recombination. The continuity equation is derived by considering the carrier flux into and out of an infinitesimal volume of the semiconductor. Under certain approximations, the continuity equation can be simplified to the minority carrier diffusion equations, which describe the behavior of excess carriers in the semiconductor.

PMMC instruments, Galvanometer, DC Voltmeter, DC Ammeter

The Presentation covers, PMMC instrument construction and working, Galvanometer, DC ammeter, DC voltmeter, series ohm meter,

Working principle diode and special diode

This document discusses different types of diodes, including their basic functions and applications. It begins with an overview of basic diodes and their current-voltage characteristics. It then focuses on special diodes like Zener diodes, which maintain a relatively constant voltage when operated in reverse breakdown. Other diodes discussed include varactor diodes, light-emitting diodes (LEDs), photodiodes, Schottky diodes, laser diodes, PIN diodes, current regulator diodes, step-recovery diodes, and tunnel diodes. Each type has a specialized function and is commonly used in applications like power regulation, displays, optical communications, and high-frequency switching.

harmonic distortion ppt

This document describes a project to build a third harmonic distortion meter using a PIC18F2550 microcontroller. It explains that non-linear components can cause harmonics in AC power systems, with the third harmonic being particularly impactful. The project involves using a microcontroller and discrete Fourier transform calculations to measure the amplitude of the fundamental frequency and third harmonic from a rectified input signal. This allows the third harmonic distortion to be displayed as a percentage. The document provides details of the circuit design and software used to implement this third harmonic distortion meter.

Field Effect Transistor

FET are :
Voltage controlled devices
Higher input impedance
Less sensitive to temp. variations
Unipolar device
Smaller/ Easily Integrated Chips

Diode circuits

This document discusses semiconductor diodes and rectifiers. It begins by explaining the physical principles of semiconductors, including intrinsic semiconductors and how doping with materials like phosphorus or boron creates n-type and p-type semiconductors. When a p-type and n-type material meet, it forms a pn junction with interesting electrical properties. Diodes are made from pn junctions and exhibit asymmetric conduction, allowing current in one direction but blocking it in the other. Diode circuits and models are also covered, along with important applications like rectification where diodes are used to convert AC to DC power.

Biot-savart law

The Biot-Savart law describes the magnetic field generated by electric currents. It states that the magnetic field at a point P due to a current element I ds is proportional to the current I and inversely proportional to the distance r from the current element to the point P. The field is also proportional to the length of the current element ds and perpendicular to both r and ds. Integrating this contribution from all current elements gives the total magnetic field generated by the current distribution. Specific applications include calculating the field from a long straight wire, circular loop, and tightly wound coil.

Presentation on half and full wave ractifier.ppt

Kawsar Ahmed presented on half wave and full wave rectifiers. The half wave rectifier only conducts current during one half of the AC cycle, resulting in a lower output. The full wave rectifier uses two diodes or a bridge configuration to conduct current over both halves of the AC cycle, doubling the output. A center tap full wave rectifier uses two diodes and a center tapped transformer, while a bridge rectifier eliminates the need for a center tap and uses four diodes. Both full wave rectifiers provide an output with less ripple and higher efficiency than the half wave rectifier.

Magnetostatic fields

Magnetostatic fields

3.bipolar junction transistor (bjt)

3.bipolar junction transistor (bjt)

TRANSISTORS

TRANSISTORS

ELECTROMAGNETIC FIELDS

ELECTROMAGNETIC FIELDS

A.c circuits

A.c circuits

Magnetic hall effect based sensors final

Magnetic hall effect based sensors final

Transmission lines

Transmission lines

Hybrid Parameter in BJT

Hybrid Parameter in BJT

[Electricity and Magnetism] Electrodynamics

[Electricity and Magnetism] Electrodynamics

Magnetic sensors

Magnetic sensors

Application of diode

Application of diode

Chap6 photodetectors

Chap6 photodetectors

Continiuty Equation

Continiuty Equation

PMMC instruments, Galvanometer, DC Voltmeter, DC Ammeter

PMMC instruments, Galvanometer, DC Voltmeter, DC Ammeter

Working principle diode and special diode

Working principle diode and special diode

harmonic distortion ppt

harmonic distortion ppt

Field Effect Transistor

Field Effect Transistor

Diode circuits

Diode circuits

Biot-savart law

Biot-savart law

Presentation on half and full wave ractifier.ppt

Presentation on half and full wave ractifier.ppt

UNIT 3 - Magnetostatics - Problems

This document contains solutions to problems involving electromagnetic fields and magnetostatics. It includes calculations of permeability, magnetic field intensity, magnetization, inductance, magnetic torque, and energy stored in an inductor. Key concepts covered are relative permeability, magnetic flux, reluctance, ampere turns, self and mutual inductance. Calculations are shown for solenoids, toroids, and magnetic materials.

Ee2251 em-i

This document is a question paper for an Electrical and Machines Engineering examination. It contains 15 multiple choice and numerical problems covering topics like basic rotating electric machines, electromagnetic induction, transformer equivalent circuits, magnetic circuits, electric motor principles and characteristics. Students are required to answer all questions in the paper which is divided into two parts - Part A contains 10 short 2-mark questions, and Part B contains 5 long 16-mark numerical problems.

Jee main-2014-solution-code-h-english

1. The document contains a physics exam with 16 multiple choice questions covering topics like mechanics, electromagnetism, thermodynamics, and modern physics.
2. Question 1 asks about the pressure required to keep a steel wire at a constant length when its temperature increases by 100°C based on the wire's properties.
3. Several other questions ask about concepts like angular momentum, diode current-voltage characteristics, electromagnetic waves, capacitors, simple harmonic motion, electromagnetic induction, and kinematics for particles in vertical motion.

Anschp31

1) The chapter discusses electromagnetic induction, including induced electromotive force (emf) in coils due to changing magnetic fields. Several examples are worked out calculating induced emf in coils undergoing various changes in magnetic flux.
2) Generators are also discussed, including the factors that determine the maximum emf generated by coils rotating in magnetic fields. Examples calculate the rotation speed required to produce a given maximum emf.
3) The concept of back emf in DC motors is introduced, along with an example calculating the back emf and starting current of a motor operating at 120V.

AIPMT Physics 1995

This document contains an unsolved physics exam from 1995 consisting of 50 multiple choice questions testing concepts in physics. The questions cover topics including p-n junctions, crystal structure, radioactive decay, nuclear binding energies, half life, electromagnetic waves, conductivity, X-rays, electron behavior, electric fields, circuits, heat transfer, magnetism, optics, quantum mechanics, and rotational motion. For each question, four possible answers are provided and test takers are asked to select the correct answer.

Physics Sample Paper with General Instruction for Class - 12

Learning 360 brings “Physics sample paper” for CLASS – 12. This document also carries 31 questions with solution of each given question for better understanding of the students. Download for free now; http://www.learning360.net/study_hub/1090-2/

Exam3 sol

This document contains solutions to 12 exam problems from a physics course. The solutions provide the following key details:
1) For the first problem, the solution states that statement (a) is true - just after closing the switch, resistor 1 carries zero current.
2) For the second problem, the solution states that statements (a), (b), and (c) are all true regarding the magnetic properties of paramagnetic and diamagnetic materials.
3) For the last problem, the solution finds that the net magnetic flux through the curved surface of a Gaussian cylinder must be 47.4 mWb directed inward to satisfy that the total flux through any closed surface is zero.

nothing

This document contains physics examination papers from 2008-2012 administered by the Central Board of Secondary Education (CBSE) in Delhi, India. It lists the contents which include CBSE examination papers from Delhi and All India in those years, as well as foreign papers. A sample paper from the 2008 Delhi exam is then provided, consisting of 30 multiple choice questions testing concepts in physics.

TIME-VARYING FIELDS AND MAXWELL's EQUATIONS -Unit4- problems

1) A 200-turn coil has an induced emf of -3.8 volts at t=10 seconds when the flux through each turn is t(t-1) mwb.
2) A conductor moving at 100 m/s perpendicular to a 1 Tesla magnetic field induces an emf of 100 volts.
3) A parallel plate capacitor with a 10 cm^2 area, 5 mm separation, and 10 sin(100πt) voltage applied has a displacement current of 5.56×10^-9 cos(100πt) amps.

Aieee Physics 2006

This document contains a physics exam with 41 multiple choice questions covering topics like kinematics, forces, energy, oscillations, optics, electricity, magnetism, modern physics and thermodynamics. The questions are from an unsolved past paper from 2006 for AEEE, which appears to be an entrance exam of some kind. Each question provides 4 possible answers, but only one is correct.

12th physics-solution set 3

This document contains solutions to physics problems from the 12th CBSE exam. It discusses topics like Lenz's law, electric fields, the photoelectric effect, atomic spectra of hydrogen, rectifiers, and more. The solutions are presented in point form and range from short explanations to longer derivations. Overall, the document provides concise answers and working steps to multiple conceptual and numerical problems in 12th grade physics.

Physics(JEE-MAINS)

This document contains 29 physics questions from the JEEMain2014 exam. The questions cover topics such as mechanics, electromagnetism, optics, thermodynamics and modern physics. They include multiple choice questions testing conceptual understanding, calculations and problem solving abilities. The document provides the questions, multiple choice options for each question, and indicates the solution or correct answer.

Phys 201 1st

This document contains a physics exam with 12 multiple choice questions covering various topics in physics including electromagnetism, optics, and energy conversion. The exam tests students on their understanding of concepts such as induced electric fields, RLC circuits, transformers, electromagnetic waves, light refraction and reflection, and solar energy generation. Students are asked to calculate values like magnetic field strength, resonance frequency, critical angle, and area needed to generate a given power output.

Lecture note e2063

The left-hand rule for motors is used to determine the direction of force and motion produced on a current-carrying conductor in a magnetic field.
To use the left-hand rule:
1. Point the thumb of your left hand in the direction of the magnetic field lines.
2. Point your index finger in the direction of the current flowing through the conductor.
3. Your middle finger will now point in the direction of the force on the conductor due to the interaction of the current and magnetic field.
The direction of the force gives the direction of motion of the conductor. This principle is used in DC motors to generate a rotational motion from an electrical current.

Cbse class 12 physics sample paper 02 (for 2014)

The document provides a sample physics question paper for Class 12 with 29 questions ranging from 1 to 5 marks. It includes questions from various topics in physics like electromagnetism, optics, modern physics, semiconductor devices, communication systems, and electrical circuits. The paper tests concepts, calculations, principles, diagrams, and applications of concepts across different areas of the physics syllabus. It provides guidelines for time, marks distribution and instructions for answering the questions.

Basic electronics Tutorial 2

This document provides a tutorial on semiconductor diodes with 20 practice problems. It covers topics such as determining diode resistance and capacitance from characteristic curves, calculating diffusion current density, and solving circuits that include diodes and zener diodes. The problems involve calculating values such as current, voltage, resistance, capacitance, and concentrations using semiconductor properties, characteristic curves, and circuit equations.

Problem i ph o 14

This document contains 5 theoretical physics problems from the 1983 International Physics Olympiad (IPhO).
1) The first problem involves calculating the path length and speed of a particle moving in one dimension under a force and reflecting off a wall.
2) The second problem involves calculating properties of electric oscillations in an LC circuit with alternating current, including the maximum power frequency and amplitude of current oscillations.
3) The third problem involves calculating ray paths and deviations for light passing through a system of dispersive prisms.
4) The fourth problem involves using Compton scattering to calculate the de Broglie wavelength of an electron before collision based on wavelengths of photons before and after two scattering events.

AIPMT Physics 1998

The document is a physics exam with 42 multiple choice questions covering topics like thermodynamics, waves, optics, electricity, modern physics, and mechanics. It provides the question stem and four possible answer choices for each question.

Ac circuits

Electrical Engineering is the Branch of Engineering. Electrical Engineering field requires an understanding of core areas including Thermal and Hydraulics Prime Movers, Analog Electronic Circuits, Network Analysis and Synthesis, DC Machines and Transformers, Digital Electronic Circuits, Fundamentals of Power Electronics, Control System Engineering, Engineering Electromagnetics, Microprocessor and Microcontroller. Ekeeda offers Online Mechanical Engineering Courses for all the Subjects as per the Syllabus https://ekeeda.com/streamdetails/stream/Electrical-Engineering

3. a. c. circits

This document provides an introduction and overview of alternating current (AC) circuits. It discusses various topics including:
1) AC waveforms such as sinusoidal waves and their advantages over other waveforms.
2) How alternating voltage and current are generated using devices like alternators that rotate a coil in a magnetic field.
3) Key concepts in AC circuits like phase, phase difference, RMS and average values, and phasor representation.
4) How AC behaves when passing through circuit elements like resistors, inductors, and capacitors.
The document contains explanations, diagrams and equations related to these fundamental AC circuit concepts.

UNIT 3 - Magnetostatics - Problems

UNIT 3 - Magnetostatics - Problems

Ee2251 em-i

Ee2251 em-i

Jee main-2014-solution-code-h-english

Jee main-2014-solution-code-h-english

Anschp31

Anschp31

AIPMT Physics 1995

AIPMT Physics 1995

Physics Sample Paper with General Instruction for Class - 12

Physics Sample Paper with General Instruction for Class - 12

Exam3 sol

Exam3 sol

nothing

nothing

TIME-VARYING FIELDS AND MAXWELL's EQUATIONS -Unit4- problems

TIME-VARYING FIELDS AND MAXWELL's EQUATIONS -Unit4- problems

Aieee Physics 2006

Aieee Physics 2006

12th physics-solution set 3

12th physics-solution set 3

Physics(JEE-MAINS)

Physics(JEE-MAINS)

Phys 201 1st

Phys 201 1st

Lecture note e2063

Lecture note e2063

Cbse class 12 physics sample paper 02 (for 2014)

Cbse class 12 physics sample paper 02 (for 2014)

Basic electronics Tutorial 2

Basic electronics Tutorial 2

Problem i ph o 14

Problem i ph o 14

AIPMT Physics 1998

AIPMT Physics 1998

Ac circuits

Ac circuits

3. a. c. circits

3. a. c. circits

Oc unit 2 - Part II - Transmission Characteristics

This document discusses transmission characteristics of optical fibers, including:
- Attenuation losses such as absorption and scattering losses that reduce signal strength.
- Dispersion which causes pulses to spread, interfering with each other (intersymbol interference) and limiting bandwidth. Types of dispersion include material dispersion and waveguide dispersion.
- Single mode fibers which only propagate a single mode and have low dispersion. Dispersion can be optimized by designing the refractive index profile, such as in dispersion shifted or flattened fibers.

Optical Communication Unit 1 - Mode Theory

Here are the solutions to the exercises:
1) For a GI fiber with parabolic profile, Vmax = 2.405 for single mode operation.
Using the given: n1 = 1.5, Δ = 1%, λ = 1.3 μm
Vmax = (2π/λ) * a * (n1^2 - n2^2)^1/2
= 2.405
Solving for a, the maximum core diameter is 5.2 μm.
2) Given: n1 = 1.54, n2 = 1.5, a = 25 μm, λ = 1300 nm
NA = (n1^2 - n2^2)^1/

Optical Communication - Unit 1 - introduction

This document provides an introduction and overview of a course on optical communication. The objectives are to study optical fiber modes, configurations, materials and fabrication techniques. It will also cover transmission characteristics, optical sources and detectors, optical receivers, and measurements. The syllabus outlines 5 units that will be covered: introduction to optical fibers, transmission characteristics, optical sources and detectors, optical receivers and measurements, and optical communication systems and networks. The course aims to provide knowledge of basic optical fiber elements, transmission analysis, system design, and measurements.

UNIT III - Magnetic Materials & Magnetic Boundary Conditions

The document discusses concepts related to magnetostatics including:
- Magnetic field intensity (H) and magnetic flux density (B)
- Ampere's law and how it relates to the tangential components of H and B at boundaries between magnetic materials
- Gauss's law and how it relates to the normal components of B being continuous at boundaries, while the normal components of H are proportional to the relative permeability of the materials
- Classification of magnetic materials including diamagnetic, paramagnetic, ferromagnetic, antiferromagnetic, and ferrimagnetic materials
- Magnetic circuits and how they are analogous to electric circuits in terms of concepts like magnetomotive force, reluctance, and magnetic flux

Unit IV Boundary Conditions

The document discusses electromagnetic boundary conditions between two different media. It states that while electromagnetic quantities vary smoothly within a homogeneous medium, they can be discontinuous at boundaries between dissimilar media. The document then derives and explains the boundary conditions for the electric and magnetic fields at such interfaces. Specifically, it shows that the tangential components of E and B are continuous, while the normal components of D and B are continuous, but the normal component of H is discontinuous and depends on the relative permeability of the two media.

EC 8395 - Communication Engineering - Unit 3 m - ary signaling

This document discusses M-ary digital modulation techniques. It begins by defining M-ary signaling as a technique where multiple bits are transmitted simultaneously using a single signal, instead of transmitting one bit at a time. It then provides the basic equation for calculating the number of possible conditions (M) based on the number of bits (N).
The document goes on to describe several common M-ary modulation techniques including M-ary PSK, M-ary QAM, and their basic principles and equations. It provides examples of 4-PSK, 8-PSK, 16-PSK, 8-QAM and 16-QAM, explaining their modulation/demodulation, constellations, and minimum bandwidth requirements. Finally, it compares several

AM - Modulator and Demodulator

This document discusses various aspects of amplitude modulation (AM) including modulation, demodulation, and different types of AM modulators and demodulators. It describes how AM works by varying the amplitude of the carrier wave proportionally to the message signal. It also explains amplitude demodulation, the process of extracting the original message signal. Finally, it covers different AM systems like DSB-FC, DSB-SC, SSB and their corresponding modulators and demodulators like square law, balanced, and coherent detectors.

Optical Communication Unit 1 - Part 2

This document discusses optical fiber communication and ray optics models. It begins by introducing different types of rays in optical fibers including meridional, skew, guided, and leaky rays. It then covers ray theory transmission and the ray model. Key aspects of meridional, skew, and leaky rays are defined. The document also discusses step index and graded index optical fibers as well as their characteristics and applications.

Wireless LAN

This document provides an overview of wireless networks and the IEEE 802.11 standards. It discusses wireless LAN technologies including IEEE 802.11, HiperLAN, Bluetooth, and various amendments. It describes the infrastructure and ad-hoc modes of wireless LANs. It also summarizes key standards such as 802.11a, 802.11b, their architectures, protocols, and parameters. Finally, it provides details on the HiperLAN standard developed by ETSI for wireless local area networks in Europe.

Wireless networks - 4G & Beyond

Multicarrier modulation is a technique for transmitting data over multiple carriers. It has advantages like resilience to interference and fading. One form is OFDM, which divides data over multiple orthogonal subcarriers. This avoids interference between carriers. OFDM is widely used in wireless technologies due to its spectral efficiency and resilience to multipath effects. Smart antennas and MIMO are techniques that use multiple antennas to improve wireless communication capabilities. IMS is an architectural framework that delivers multimedia services over an IP network for mobile phones. It contains elements like the HSS user database.

EC8004 - Wireless Networks Question Bank

This document contains 95 questions related to wireless networks and mobile communication systems. The questions cover topics such as infrared technology, spread spectrum techniques, IEEE 802.11, HIPERLAN, WiMax, mobile IP, routing protocols, UTRAN architecture, 3G UMTS network architecture, internetworking between WLAN and 3G networks, 4G features and challenges, orthogonal frequency division multiplexing, smart antenna techniques, LTE architecture, IMS architecture, and MVNO. The questions are divided into three parts - multiple choice questions, descriptive questions requiring short answers, and detailed descriptive questions requiring longer answers.

EC 8004 wireless networks -Two marks with answers

The document discusses various aspects of wireless networks including infrared transmission, spread spectrum techniques, issues in wireless local area networks (WLAN), applications of WLAN, IEEE 802.11 standard, medium access control in IEEE 802.11, wireless asynchronous transfer mode (WATM), high performance radio local area network (HIPERLAN), Bluetooth, mobile IP, ad hoc networks, dynamic host configuration protocol (DHCP), session initiation protocol (SIP), orthogonal frequency division multiplexing (OFDM), and 4G and beyond technologies. Key topics covered are infrared and spread spectrum transmission methods, MAC functions in 802.11, requirements of HIPERLAN, states and modulation in Bluetooth, entities in mobile IP, characteristics

Oc unit 2 - Part II - Transmission Characteristics

Oc unit 2 - Part II - Transmission Characteristics

Optical Communication Unit 1 - Mode Theory

Optical Communication Unit 1 - Mode Theory

Optical Communication - Unit 1 - introduction

Optical Communication - Unit 1 - introduction

UNIT III - Magnetic Materials & Magnetic Boundary Conditions

UNIT III - Magnetic Materials & Magnetic Boundary Conditions

Unit IV Boundary Conditions

Unit IV Boundary Conditions

EC 8395 - Communication Engineering - Unit 3 m - ary signaling

EC 8395 - Communication Engineering - Unit 3 m - ary signaling

AM - Modulator and Demodulator

AM - Modulator and Demodulator

Optical Communication Unit 1 - Part 2

Optical Communication Unit 1 - Part 2

Wireless LAN

Wireless LAN

Wireless networks - 4G & Beyond

Wireless networks - 4G & Beyond

EC8004 - Wireless Networks Question Bank

EC8004 - Wireless Networks Question Bank

EC 8004 wireless networks -Two marks with answers

EC 8004 wireless networks -Two marks with answers

AI chapter1 introduction to artificial intelligence

AI chapter1 introduction to artificial intelligence

Generative AI and Large Language Models (LLMs)

Generative AI and Large Language Models (LLMs)

If we're running two pumps, why aren't we getting twice as much flow? v.17

A single pump operating at a time is easy to figure out. Adding a second pump (or more) makes things a bit more complicated. That complication can deliver a whole lot of additional flow -- or it can become an exercise in futility.

High Profile Girls Call Delhi 9711199171 Provide Best And Top Girl Service An...

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charting the development of the autonomous train

explain the strengths, weaknesses, opportunities and threats of autonomous train development

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Updated Limitations of Simplified Methods for Evaluating the Potential for Li...

Updated technical note

Distillation-1.vapour liquid equilibrium

Distillation basic knowledge is given in this PPT for the vapour liquid equilibrium in which we can understand the basic knowledge for the separation of the two miscible liquid which is being separation by the vapour temperature is it separated by the more related to this again the structure of structure

ISO 9001 - 2015 Quality Management Awareness.pdf

This course about corporate awareness of ISO 9001

Technical Seminar of Mca computer vision .ppt

Technical Seminar of Mca computer vision

How to Formulate A Good Research Question

How to Formulate A Research Question

NOVEC 1230 Fire Suppression System Presentation

NOVEC 1230 Fire Suppression System Presentation

Santa Barbara City College degree offer diploma Transcript

学历定制【微信号:95270640】《(UCSB毕业证书)圣塔芭芭拉社区大学毕业证》【微信号:95270640】《毕业证、成绩单、外壳、雅思、offer、真实留信官方学历认证（永久存档/真实可查）》采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
【关于学历材料质量】
我们承诺采用的是学校原版纸张（原版纸质、底色、纹路）我们工厂拥有全套进口原装设备，特殊工艺都是采用不同机器制作，仿真度基本可以达到100%，所有成品以及工艺效果都可提前给客户展示，不满意可以根据客户要求进行调整，直到满意为止！
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一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信号95270640】文凭即可
二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信号95270640】即可
三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
留信网服务项目：
1、留学生专业人才库服务（留信分析）
2、国（境）学习人员提供就业推荐信服务
3、留学人员区块链存储服务
【关于价格问题（保证一手价格）】
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：客户在留信官方认证查询网站查询到认证通过结果后付款，不成功不收费！

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- 1. R.M.K. COLLEGE OF ENGINEERING AND TECHNOLOGY RSM Nagar, Puduvoyal - 601 206 DEPARTMENT OF ECE EC 8451 ELECTRO MAGNETIC FIELDS UNIT IV TIME - VARYING FIELDS AND MAXWELL’S EQUATIONS Dr. KANNAN K AP/ECE
- 2. Problems in Inductance (i) A Solenoid has inductance of 20 mH. If the length of the Solenoid is increased by 2 times and the radius is decreased to half of its original value. Find new inductance Solution : Given L1 = 20 mH , 2l1 = l2 and radius r1/2 = r2 Inductance of the Solenoid L1 = 𝜇0 𝑁1 2𝐴1 l1 The new inductance of the solenoid L2 = = 𝜇0 𝑁2 2𝐴2 l2 Here N1 = N2, A1=𝜋 r1 2 ,A2 = 𝜋 (r1 2 /4) = 4 A1 L2 L1 = 𝑁1 24𝐴1 l1 𝑁1 2𝐴1 2l1 = 4 2 L2 = 2 L1 = 2 x 20 mH = 40 mH
- 3. (ii) A toroid of mean radius 0.1m and 10cm2 cross sectional area is uniformly wound with 250 turns of wire. If B is 1 Tesla and µr =500, what is the current required to be passed in the winding? Determine also the value of self inductance Solution: Available Data : r =0.1m, A = 10cm2 = 10 x 10-4 m2 N = 250 turns , B = 1 tesla , µr =500 We know that, Φ = B A = 1 x 10 x 10-4 = 10 x 10-4 Wb B = µ0 µr H = µ0 µrNI 2 𝜋 𝑅𝑚 1 𝐼 = 4 𝜋 𝑥 10−7 𝑥 500 𝑥 250 1𝑥2 𝑥 𝜋 𝑥 0.1 = 0.25 I = 4A L = N Φ/I = = 250 x 10 𝑥 10−4 4 L = 0.0625H
- 4. (iii) A loop with magnetic dipole moment 8x10 -3 a z A.m 2 lies in a uniform magnetic field B=0.2a x +0.4a z wb/m 2 . Calculate the torque. Solution : Torque T = M X B = 8x10 -3 a z x (0.2a x +0.4a z ) = 1.6 x 10 -3 a y (iv) What is the maximum torque on a square loop of 100 turns in a field of uniform flux density 3 Tesla? The loop has 20cm sides and carries a current of 10A. Solution : Torque T = BIA Sin Θ Maximum torque is obtained when Θ = 90o Tmax = BIA Area of square loop = 4 x 20 x10-2 = 80 x 10-2 m2 Square loop = 100 turns , 100 x 80 x 10-2 m2 = 80 m2 Tmax = 3 x 10 x 80 m2 = 2400 N-m
- 5. (v) An iron ring of relative permeability 100 is wound uniformly with two coils of 100 and 400 turns of wire. The cross section of the ring is 4cm 2 . The mean circumference is 50cm. Calculate (i) The self inductance of each of the two coils (ii) The mutual inductance (iii) Total inductance when the coils are connected in series with flux in the same sense (iv) Total inductance when the coils are connected in series with flux in the opposite sense. Solution: (i) Self Inductance of Coil with 1000 turns L = µ0 N2A 2 𝜋 𝑅𝑚 = = 4 𝜋 𝑥 10−7 x 1002 x 4 50 𝑥 10−2 = 0.1 Hendry Self Inductance of Coil with 400 turns L = µ0 N2A 2 𝜋 𝑅𝑚 = = 4 𝜋 𝑥 10−7 x 4002 x 4 50 𝑥 10−2 = 1.61 Hendry (ii) Mutual Inductance L = µ0µ1N1N2A 2 𝜋 𝑅𝑚 = 4 𝜋 𝑥 10−7 x 100 x 400 x 4 50 𝑥 10−2 = 0.402 Hendry (iii) Total Inductance L = L1 + L2 + 2M = 0.1 + 1.61 + 2 x 0.402 = 2.51 (iv) Total Inductance when the coils are in series with flux in opposite sense L = L1 + L2 - 2M = 0.1 + 1.61 - 2 x 0.402 = 0.91
- 6. (vi) A solenoid is 50 cm long, 2 cm in diameter and contains 1500 turns. The cylindrical core has a diameter of 2 cm and a relative permeability of 75. This coil is coaxial with second solenoid, also 50 cm long, but 3 cm diameter and 1200 turns. Calculate L for the inner solenoid and L for outer solenoid and M between two solenoids. Solution : Inductance of inner solenoid L1 = 𝜇0 𝜇𝑟𝑁1 2𝐴1 l1 = 4 𝜋 𝑥 10−7 𝑥 75 𝑥 1500 2 𝑥 𝜋 𝑥 1 𝑥 10−2 2 50 𝑥 10−2 = 133.2mH Inductance of outer solenoid L2 = 𝜇0 𝜇𝑟𝑁2 2𝐴2 l2 = 4 𝜋 𝑥 10−7 𝑥 75 𝑥 1200 2 𝑥 𝜋 𝑥 1.5 𝑥 10−2 2 50 𝑥 10−2 = 191.87mH Mutual Inductance M = µ0µ1N1N2A 𝑙 = 4 𝜋 𝑥 10−7 𝑥 75 𝑥 1200 𝑥 1500 𝑥 𝜋 𝑥 0.01 2 50 = 106.6mH. (vii) A current of 2A flowing in an inductor of inductance 100mH.What is the energy stored in the inductor? Solution : Energy Stored = 1 2 LI2 = 1 2 x 100 x 10 -3 x 22 = 200mv