Potential Dividers, Oscilloscope and revision activities.ppt
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The document discusses a lesson plan that includes using an oscilloscope, potential dividers as control circuits, and revising concepts covered so far. It proposes test dates and outlines the agenda for the lesson, which includes a demo of oscilloscopes, deriving equations for potential dividers and examples of their uses, and reviewing topics like charge carriers, potential difference, resistors, and circuits.
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This document contains a syllabus for a course on Analog and Digital Electronics. The syllabus covers 5 units: Diodes and Applications, Bipolar Junction Transistors, Combinational Logic Circuits, Field Effect Transistors and Digital Circuits, and Sequential Logic Circuits. Unit I focuses on diode characteristics such as I-V curves and applications like rectifiers. Diode types covered include PN junction diodes, Zener diodes, and photo diodes. Rectifier circuits such as half wave, full wave, and bridge rectifiers are also discussed along with capacitor filters.
Circuitos eletricos conceitual
This document discusses electrical circuits and basic concepts. It begins by explaining atomic arrangement in metal plates and free electrons that move between atoms. It then provides a model of electric current flowing through a wire, with an analogy to students leaving a classroom. It defines electric current intensity as the amount of electric charge flowing through a conductor cross-section per unit of time. Finally, it notes that batteries have the ability to supply a certain amount of current over an hour, measured in ampere-hours.
Circuitos eletricos conceitual
The document discusses electrical circuits and basic concepts. It explains that in metallic plates, electrons move freely between atoms. It also provides an analogy that the flow of students leaving a classroom during recess is similar to the flow of electrons in a wire. Finally, it defines electric current as the amount of electric charge flowing through a conductor per unit of time.
08_electronics.basics and introductionqw
1. Resistors are electronic components that impede electric current. There are fixed resistors with set resistance and variable resistors like potentiometers that can be adjusted.
2. Relays are switches that use an electromagnet to open or close a circuit. They allow low-power circuits to control high-power devices safely.
3. Capacitors can store electric charge and come in polarized or non-polarized varieties. The amount of charge a capacitor can hold depends on its capacitance. Capacitors charge and discharge through resistors at a rate determined by their time constant.
Potential-diff-resistance.ppt
This document provides an overview of key concepts related to electric circuits, including:
1) Describing the differences between direct and alternating currents, and discussing challenges students face distinguishing between voltage and current.
2) Explaining how batteries supply energy to a circuit by transferring energy to charges located in circuit components like filaments, in accordance with the law of conservation of energy.
3) Discussing models used to represent circuits, including water and hill models, and how more accurate representations show batteries maintaining electric fields.
4) Defining concepts like electromotive force, potential difference, resistance, and how these relate to determining current and power in both simple and complex circuit configurations.
Intro to Electricity.ppt
This document provides an introduction to key concepts related to electricity including charge, current, voltage, circuits, and circuit elements. It defines charge as the fundamental electric quantity carried by electrons and protons. Current is defined as the rate of flow of electrons through a conductor. Voltage is the potential difference required to move charge between two points. Analogies are provided between electric circuits and water flow. Key circuit elements like resistors and capacitors are introduced along with their symbols, units of measurement, and functions. Formulas for resistance, capacitance, and their characteristics are also outlined.
BEE.pdf
This document provides an overview of an electrical circuits power point presentation for a B.Tech II semester engineering course. The presentation was prepared by several course instructors and covers topics such as potential difference, basic circuit components, Ohm's law, series and parallel circuits, Kirchhoff's laws, and mesh analysis. It defines key concepts like voltage, current, resistance, and power. Examples are provided to illustrate calculations for series, parallel and compound circuits. Transformation techniques like star-delta are also explained. The goal is to introduce foundational electrical circuit analysis concepts.
Introduction to Electricity
This document provides an introduction to basic electrical concepts including charge, current, voltage, resistors, and capacitors. It defines each concept, provides examples and analogies to explain them, and discusses how components such as resistors and capacitors are constructed and operate in electrical circuits. Key points covered include that charge is carried by electrons and protons, current is the flow of electrons, voltage is needed to push charge through a circuit, and resistors and capacitors can store and control the flow of electric charge and energy.
Basics Of Electricity
The document provides an overview of basics of electricity including:
1) A brief history of electrical power systems and key inventors like Thomas Edison, Frank Julian Sprague, Nikola Tesla, and William Stanley.
2) Descriptions of electrons, protons, voltage, current, resistance, and basic electric circuits.
3) Explanations of conductors, insulators, electromagnetic fields, and other fundamental concepts.
Resonant Response of RLC Circuits
The document summarizes an experiment on analyzing series and parallel RLC circuits. It describes:
1) Calculating the theoretical resonance frequency of a series RLC circuit as 18.8 kHz, but measuring it experimentally as 16.73 kHz, a difference of 11.1%.
2) Plotting the output voltage versus frequency, which reaches a minimum at the theoretical resonance point.
3) Analyzing the phase relationship and impedance characteristics at resonance, finding the voltage and current are in phase.
Similar to Potential Dividers, Oscilloscope and revision activities.ppt (20)
Electromagnetism, electricity and digital electronics
Electromagnetism, electricity and digital electronics
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Chinese new year
The Jade Emperor held a swimming race between animals to determine the order of the zodiac. The rat tricked the cat into falling in the river and leapt onto the ox's head at the finish to come in first, with the ox second. The order of the zodiac was decided based on the animals' placement in the race.
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Pressure is defined as the force per unit area applied perpendicular to a surface. It is useful for understanding weight, space travel by knowing safe distances from planets, and measuring blood pressure which is important for health. Pressure can be calculated as force divided by area. Moments are the turning effect of forces on objects with fixed points like hinges or axles, causing them to rotate. Moments are calculated as the force times the distance from the pivot point.
Pressure and moments (3)
Pressure is a type of force measured as the force applied over an area. It can be high, like the pressure from stilettos, or low, like the pressure from dice. Pressure is calculated using the formula of force divided by area. Moments are also a type of force but are not symbolized on the periodic table like pressure. Levers can be used to increase or decrease the magnitude of a force and change the direction of its application through its fulcrum.
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Alternating current generator
An alternating current generator consists of a rectangular coil that spins within a magnetic field, inducing an electromotive force (EMF) that varies with the cosine of the angle between the coil and magnetic field. Power station alternators have three coil sets spaced 120 degrees apart, each producing an alternating EMF 120 degrees out of phase with the others. The electromagnet at the center spins rather than the coils. A back EMF is induced in a spinning electric motor coil as the flux linkage through it changes, opposing the applied voltage and wasting power through circuit resistance.
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Fossil fuels like coal, oil and gas take several years to form naturally, whereas solar and wind power are renewable energy sources with some disadvantages. Solar power has advantages of being sustainable and environmentally-friendly but is extremely expensive, while wind power is cheap but produces intermittent energy depending on weather conditions. Solar power installations can be costly.
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This document discusses the consequences of climate change such as melting ice caps flooding, freak weather storms, and colder wetter winters. It also notes that fossil fuels produce CO2 and cannot be reused, and will eventually run out, while renewable energies can be reused, last longer and are more efficient.
powerstation 3
Fossil fuels like coal, gas, and oil release CO2 into the atmosphere and will eventually run out, as they were made millions of years ago underground. Wind and solar power are renewable sources that will not run out, but wind turbines need windy areas and solar panels work best in sunny places like Africa rather than the UK with less sun.
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The document discusses different energy sources such as fossil fuels, wind turbines, and solar panels. Fossil fuels release carbon dioxide into the atmosphere while wind turbines and solar panels do not pollute but have disadvantages of taking up space and not working without wind or sun. The consequences of global warming include wetter winters, warmer summers, melting ice caps which endangers Arctic and Antarctic animals. Individuals can help by recycling, conserving electricity and water, and not wasting energy.
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Potential Dividers, Oscilloscope and revision activities.ppt
- 1. Potential Dividers, Oscilloscope and revision activities Lets see how we are getting on
- 3. What we are going to achieve today 1)Using an Oscilloscope demo 2)Potential Dividers as control circuits 3)Revision and extension of work done so far; ready for the test.
- 4. Oscilloscopes A quick Demo and Explanation Next lesson you will use one as a voltmeter for an AC signal Name That Tune!
- 6. Deriving the Equation Current through the R1 and R2 I = V/R I = Vin / (R 1 + R 2 ) Voltage across R 1 V = I R 1 V = Vin (R 1 / (R 1 +R 2 ) ) Voltage across R 2 V out = I R 2
- 7. Uses of potential dividers When it is warm the thermistor has a low resistance When will Vout be high? When will Vout be low? R Thermistor What could this circuit be used for? R is set to be the average resistance of the thermistor’s resistance
- 8. Uses of potential dividers When it is warm the thermistor has a low resistance When will Vout be high? When it is warm When will Vout be low? When it is cold R Thermistor What could this circuit be used for? Control the speed of a fan R is set to be the average resistance of the thermistor’s resistance
- 9. Photodiode When it is dark the photodiode has a high resistance What could this circuit be used for? When is Vout high? When is Vout low? R is set to be the average resistance of the LDR’s resistance
- 10. Photodiode When it is dark the photodiode has a high resistance What could this circuit be used for? Control street lights When is Vout high? When it is dark When is Vout low? When it is light
- 11. Variable resistor 9 Volts R Variable resistor R is set to be the average resistance of the variable resistor’s resistance The variable resistor can be adjusted to change the resistance. What could this circuit be used for?
- 12. Variable resistor 9 Volts R Variable resistor R is set to be the average resistance of the variable resistor’s resistance The variable resistor can be adjusted to change the resistance. What could this circuit be used for? Volume control Dimmer Switch Shower Temperature The person is the feed back device
- 13. Revision and Extension Topics we have covered so far Lesson one (charge carriers) What is an electric current? How can we calculate the charge flow in a circuit? What are the charge carriers? What do we mean by potential difference? How can we calculate electrical power? What is resistance heating? How do energy transfers take place in electrical devices? Lesson two (potential differnce) How does the current through a filament lamp vary with pd? What are the characteristics of a diode? When can we use Ohm’s law? Lesson three (resistivity) What causes electrical resistance? What is a superconductor? What can we use thermistor for? Lesson four (resistors) What are the rules for series and parallel circuits? How do we use the rules in circuits? What are the principles behind these rules? How do we calculate currents in circuits with; resistors in series and parallel?
- 15. Lesson One Charge carriers – can be electrons or ions (positively or negatively charged atoms) Charge is a property of charge carriers ∆ Q = I ∆ t e = 1.6 x 10 C V = IR The coulomb is defined as equal to the charge flow in one second when the current is one Ampere. C = A s (Q = I t) The definition of the volt is work done per coulomb of charge transferred between two points V = W/Q
- 16. Lesson Two 1) P=VI, 2)P= I 2 R , 3)P =V 2 / R Power in electrical circuits can be found by Power is measured in Watts Work in an electrical circuit W =IV∆t Lesson three Resistivity Lesson four Rt =R1 + R2 +R3
- 18. Mission impossible Enter the code to stop the bomb Find the answer to all these questions to find the 6 digit code