Chapter 22 Current and Resistance. Reading Quiz. Answer. Reading Quiz. Topics: Sample question:


 Everett Pope
 2 years ago
 Views:
Transcription
1 Chapter 22 Current and Resistance Topics: Current Conservation of current Batteries Resistance and resistivity Simple circuits Reading Quiz 1. The charge carriers in metals are A. electrons B. positrons C. protons D. a mix of protons and electrons Sample question: How can the measurement of an electric current passed through a person s body allow a determination of the percentage body fat? Slide 221 Slide 222 Reading Quiz 1. The charge carriers in metals are A. electrons 2. A battery is connected to a resistor. Increasing the resistance of the resistor will A. increase the current in the circuit. B. decrease the current in the circuit. C. not affect the current in the circuit. Slide 223 Slide 224
2 2. A battery is connected to a resistor. Increasing the resistance of the resistor will B. decrease the current in the circuit. Reading Quiz 3. A battery is connected to a resistor. As charge flows, the chemical energy of the battery is dissipated as A. current B. voltage C. charge D. thermal energy Slide 225 Slide 226 Properties of a Current 3. A battery is connected to a resistor. As charge flows, the chemical energy of the battery is dissipated as D. thermal energy Slide 227 Slide 228
3 Definition of a Current Conservation of Current Slide 229 Slide Batteries Rank the bulbs in the following circuit according to their brightness, from brightest to dimmest. The wires below carry currents as noted. Rate the currents IA, IB and IC: A. I A > I B > I C The potential difference between the terminals of a battery, often called the terminal voltage, is the battery s emf. W chem V bat = = ε q B. I B > I A > I C C. I C > I A > I B D. I A > I C > I B E. I C > I B > I A Slide Slide 2212
4 Simple Circuits Resistivity The current is determined by the potential difference and the resistance of the wire: I = V chem R The resistance of a wire depends on its dimensions and the resistivity of its material: Slide Slide Checking Understanding Measuring Light Intensity A battery is connected to a wire, and makes a current in the wire. i. Which of the following changes would increase the current? ii. Which would decreasee the current? iii. Which would cause no change? A. Increasing the length of the wire B. Keeping the wire the same length, but making it thicker C. Using a battery with a higher rated voltage D. Making the wire into a coil, same E. Increasing the temperaturee of the wire but keeping its dimensions the A battery is connected to a photoresistor. When light shines on this resistor, it increases the number of charge carriers that are free to move in the resistor. Now, the room lights are turned off, so less light falls on the photoresistor. How does this affect the current in the circuit? A. The current increases. B. The current decreases. C. The current is not affected. Slide Slide 2216
5 A battery is connected to a photoresistor. When light shines on this resistor, it increases the number of charge carriers that are free to move in the resistor. Now, the room lights are turned off, so less light falls on the photoresistor. How does this affect the current in the circuit? B. The current decreases. Measuring Body Fat The resistivity of the body is a good measure of its overall composition. A measure of the resistance of the upper arm is a good way to estimate the percent fat in a person s body. Let s model a person s upper arm as a cylinder of diameter 8.0 cm and length 20 cm. We can model the composition of the arm by assuming that the muscle, far, and nonconductive portions (the bone) form simple regions. This simple model actually works quite well. For a typical adult, the bone has a crosssectional area of 1.0 cm 2 ; to a good approximation, the balance of the arm is fatty tissue or muscle. A. Assume that the arm has 30% fat and 70% muscle. What is the resistance of the arm? B. Now, assume that the arm has only 10% muscle. What is the resistance now? The measurement of the resistance of the arm is made by applying a voltage and measuring a current. Too much current can be uncomfortable and, as we will see, can be dangerous. Suppose we wish to limit the current to 1.0 ma. For each of the above cases, what is the maximum voltage that could be employed? Slide Slide Power in Circuits Checking Understanding A resistor is connected to a 3.0 V battery; the power dissipated in the resistor is 1.0 W. The battery is now traded for a 6.0 V battery. The power dissipated by the resistor is now A. 1.0 W B. 2.0 W C. 3.0 W D. 4.0 W Slide Slide 2220
6 A resistor is connected to a 3.0 V battery; the power dissipated in the resistor is 1.0 W. The battery is now traded for a 6.0 V battery. The power dissipated by the resistor is now D. 4.0 W Electric Blankets 1. An electric blanket has a wire that runs through the interior. A current causes energy to be dissipated in the wire, warming the blanket. A new, lowvoltage electric blanket is rated to be used at 18 V. It dissipates a power of 82 W. What is the resistance of the wire that runs through the blanket? 2. For the electric blanket of the above example, as the temperature of the wire increases, what happens to the resistance of the wire? How does this affect the curren nt in the wire? The dissipated power? Slide Slide Additional Clicker Questions 1. A set of lightbulbs have different rated voltage and power, as in the table below. Which one has the highest resistance? 1. A set of lightbulbs have different rated voltage and power, as in the table below. Which one has the highest resistance? Bulb A B C D E Rated voltage 10 V 8 V 12 V 6 V 3 V Rated power 2 W 2 W 3 W Bulb A Rated voltage 10 V Rated power Slide Slide 2224
7 Additional Clicker Questions 2. A set of lightbulbs have different rated voltage and power, as in the table below. Which one has lowest resistance? 2. A set of lightbulbs have different rated voltage and power, as in the table below. Which one has lowest resistance? Bulb A B C D E Rated voltage 10 V 8 V 12 V 6 V 3 V Rated power 2 W 2 W 3 W Bulb E Rated voltage 3 V Rated power 3 W Slide Slide Additional Clicker Questions 3. A battery makes a circuit with a lightbulb as shown. Two compasses are near the wires before and after the bulb in the circuit. Which compass experiences a larger deflection? A. Compass 1 experiences a larger deflection. B. Compass 2 experiences a larger deflection. C. Both compasses experience the same deflection. 3. A battery makes a circuit with a lightbulb as shown. Two compasses are near the wires before and after the bulb in the circuit. Which compass experiences a larger deflection? C. Both compasses experience the same deflection. Slide Slide 2228
8 Additional Clicker Questions 4. In Trial 1, a battery is connected to a single lightbulb and the brightness noted. Now, in Trial 2, a second, identical, lightbulb is added. How does the brightness of these two bulbs compare to the brightness of the single bulb in Trial 1? A. The brightness is greater. B. The brightness is the same. C. The brightness is less. 4. In Trial 1, a battery is connected to a single lightbulb and the brightness noted. Now, in Trial 2, a second, identical, lightbulb is added. How does the brightness of these two bulbs compare to the brightness of the single bulb in Trial 1? C. The brightness is less. Slide Slide Additional Examples How much time does it take for 1..0 C to flow through each of the following circuit elements? A. A 60 W reading light connected to 120 V. B. A 60 W automobile headlamp connected to 12 V. Slide 2231
Electric circuits, Current, and resistance (Chapter 22 and 23)
Electric circuits, Current, and resistance (Chapter 22 and 23) Acknowledgements: Several Images and excerpts are taken from College Physics: A strategic approach, Pearson Education Inc Current If electric
More informationAP Physics Electricity and Magnetism #4 Electrical Circuits, Kirchoff s Rules
Name Period AP Physics Electricity and Magnetism #4 Electrical Circuits, Kirchoff s Rules Dr. Campbell 1. Four 240 Ω light bulbs are connected in series. What is the total resistance of the circuit? What
More informationElectrostatics. Electrostatics Version 2
1. A 150watt lightbulb is brighter than a 60.watt lightbulb when both are operating at a potential difference of 110 volts. Compared to the resistance of and the current drawn by the 150watt lightbulb,
More informationChapter 23 Circuits. Reading Quiz. Answer. Reading Quiz. Topics: Sample question:
Chapter 23 Circuits Topics: Circuits containing multiple elements Series and parallel combinations RC circuits Electricity in the nervous system Reading Quiz 1. The bulbs in the circuit below are connected.
More informationPhysics 9 Fall 2009 Homework 6  Solutions
. Chapter 32  Exercise 8. Physics 9 Fall 29 Homework 6  s How much power is dissipated by each resistor in the figure? First, let s figure out the current in the circuit. Since the two resistors are
More informationAnswer, Key Homework 11 David McIntyre 1 1 A
nswer, Key Homework 11 avid Mcntyre 1 This printout should have 36 questions, check that it is complete. Multiplechoice questions may continue on the next column or page: find all choices before making
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) If the voltage at a point in space is zero, then the electric field must be A) zero. B) positive.
More informationKirchhoff's Rules and Applying Them
[ Assignment View ] [ Eðlisfræði 2, vor 2007 26. DC Circuits Assignment is due at 2:00am on Wednesday, February 21, 2007 Credit for problems submitted late will decrease to 0% after the deadline has passed.
More information7. What is the current in a circuit if 15 coulombs of electric charge move past a given point in 3 seconds? (1) 5 A (3) 18 A (2) 12 A (4) 45 A
1. Compared to the number of free electrons in a conductor, the number of free electrons in an insulator of the same volume is less the same greater 2. Most metals are good electrical conductors because
More informationPhysics 133: tutorial week 4 Ohm s law, electrical power, emf and internal resistance.
Physics 133: tutorial week 4 Ohm s law, electrical power, emf and internal resistance. 41. The heating element of a clothes drier has a resistance of 11Ïand is connected across a 240V electrical outlet.
More informationPeople s Physics Book
The Big Ideas: The name electric current is given to the phenomenon that occurs when an electric field moves down a wire at close to the speed of light. Voltage is the electrical energy density (energy
More informationPhysics Worksheet Electric Circuits Section: Name: Series Circuits
Do Now: (1) What is electric circuit? (2) Convert the following picture into schematic diagram. Series Circuits 4. Label every component of the circuit; identify each of the voltage and current. 5. Relation
More informationChapter 27 = J. U = 120Ah 3600s 1h. Now we compute how long we can deliver a power of 100 W with this energy available.
Chapter 7 7. A certain car battery with 1.0 V emf has an initial carge of 10 A h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how many
More informationHomework #11 20311721 Physics 2 for Students of Mechanical Engineering
Homework #11 20311721 Physics 2 for Students of Mechanical Engineering 2. A circular coil has a 10.3 cm radius and consists of 34 closely wound turns of wire. An externally produced magnetic field of
More informationUnit 7: Electric Circuits
Multiple Choice Portion 1. The diagram below shows part of an electrical circuit. Unit 7: Electric Circuits 4. A 12 V battery supplies a 5.0 A current to two light bulbs as shown below. What are the magnitude
More informationSchematic diagrams depict the construction of a circuit Uses symbols to represent specific circuit elements Documents how elements are connected so
Circuits Schematic diagrams depict the construction of a circuit Uses symbols to represent specific circuit elements Documents how elements are connected so that anyone reading diagram can understand the
More informationSolutions to Bulb questions
Solutions to Bulb questions Note: We did some basic circuits with bulbs in fact three main ones I can think of I have summarized our results below. For the final exam, you must have an understanding of
More informationChapter 11 Electricity
Chapter 11 Electricity Course Content Definition of Electricity Circuit Diagrams Series and Parallel Circuits Calculating total resistances Measurement of Electricity Ammeters and Voltmeters Ohm s Law
More informationPS6.2 Explain the factors that determine potential and kinetic energy and the transformation of one to the other.
PS6.1 Explain how the law of conservation of energy applies to the transformation of various forms of energy (including mechanical energy, electrical energy, chemical energy, light energy, sound energy,
More informationHow do you measure voltage and current in electric circuits? Materials
20A Electricity How do you measure voltage and current in electric circuits? Electricity Investigation 20A We use electricity every day, nearly every minute! In this Investigation you will build circuits
More informationStudents will need about 30 minutes to complete these constructed response tasks.
Electric Title of Circuits Concept Constructed Response Teacher Guide Students will need about 30 minutes to complete these constructed response tasks. Objectives assessed: Understand the functions of
More informationChapter 19. Electric Circuits
Chapter 9 Electric Circuits Series Wiring There are many circuits in which more than one device is connected to a voltage source. Series wiring means that the devices are connected in such a way that there
More informationMethod 1: 30x50 30 50 18.75 15 18.75 0.8. 80 Method 2: 15
The University of New South Wales School of Electrical Engineering and Telecommunications ELEC Electrical and Telecommunications Engineering Tutorial Solutions Q. In the figure below a voltage source and
More informationChapter 18: Circuits and Circuit Elements 1. Schematic diagram: diagram that depicts the construction of an electrical apparatus
Chapter 18: Circuits and Circuit Elements 1 Section 1: Schematic Diagrams and Circuits Schematic Diagrams Schematic diagram: diagram that depicts the construction of an electrical apparatus Uses symbols
More informationANSWERS to CIRCUITS V
1 ANSWERS to CIRCUITS 1. The speed with which electrons move through a copper wire is typically 104 m s 1. a. Explain why is it that the electrons cannot travel faster in the conductor? b. Explain why
More informationBackground: Electric resistance, R, is defined by:
RESISTANCE & OHM S LAW (PART I and II)  8 Objectives: To understand the relationship between applied voltage and current in a resistor and to verify Ohm s Law. To understand the relationship between applied
More informationPhysics 2212 GH Quiz #4 Solutions Spring 2015
Physics 1 GH Quiz #4 Solutions Spring 15 Fundamental Charge e = 1.6 1 19 C Mass of an Electron m e = 9.19 1 31 kg Coulomb constant K = 8.988 1 9 N m /C Vacuum Permittivity ϵ = 8.854 1 1 C /N m Earth s
More informationCh. 20 Electric Circuits
Ch. 0 Electric Circuits 0. Electromotive Force Every electronic device depends on circuits. Electrical energy is transferred from a power source, such as a battery, to a device, say a light bulb. Conducting
More informationUNIT D ELECTRICAL PRINCIPLES & TECHNOLOGIES. Science 9
UNIT D ELECTRICAL PRINCIPLES & TECHNOLOGIES Science 9 LEARNING GOALS Investigate and interpret devices that convert various forms of energy Describe technologies for the transfer and control of electrical
More informationChapter 17 Study Questions Name: Class:
Chapter 17 Study Questions Name: Class: Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. If two charges repel each other, the two charges
More informationCh22P Page 1. 1P22/1P92 Problems (2011) Chapter 22 Current and Resistance Friday, January 14, 2011 10:03 AM
Ch22P Page 1 1P22/1P92 Problems (2011) Chapter 22 Current and Resistance Friday, January 14, 2011 10:03 AM Chapter 21, WP 17 An inflatable metal balloon of radius R is charged to a potential of 1000 V.
More informationOhm's Law and Circuits
2. Conductance, Insulators and Resistance A. A conductor in electricity is a material that allows electrons to flow through it easily. Metals, in general, are good conductors. Why? The property of conductance
More informationParallel DC circuits
Parallel DC circuits This worksheet and all related files are licensed under the Creative Commons Attribution License, version 1.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/1.0/,
More informationObjectives. to understand how to use a voltmeter to measure voltage
UNIT 10 MEASUREMENTS OF VOLTAGE (from Lillian C. McDermott and the Physics Education Group, Physics by Inquiry Volume II, John Wiley and Sons, NY, 1996) Objectives to understand how to use a voltmeter
More informationElectrical Fundamentals Module 3: Parallel Circuits
Electrical Fundamentals Module 3: Parallel Circuits PREPARED BY IAT Curriculum Unit August 2008 Institute of Applied Technology, 2008 ATE310 Electrical Fundamentals 2 Module 3 Parallel Circuits Module
More informationSection 1 Current and Circuits: Practice Problems
Section 1 Current and Circuits: Practice Problems 1. A car battery causes a current through a lamp and produces 12 V across it as shown in Figure 4. What is the power used by the lamp? P = IV = (2.0 A)(12
More informationPHYS 222 Spring 2012 Final Exam. Closed books, notes, etc. No electronic device except a calculator.
PHYS 222 Spring 2012 Final Exam Closed books, notes, etc. No electronic device except a calculator. NAME: (all questions with equal weight) 1. If the distance between two point charges is tripled, the
More informationSeries and Parallel. How we wire the world
Series and Parallel How we wire the world Series vs Parallel Circuits Series Circuit Electrons only have one path to flow through. Parallel Circuit There are MULTIPLE paths for the current to flow through.
More informationPhysics 227: Lecture 10 Circuits, EMF, Power
Physics 227: Lecture 10 Circuits, EMF, Power Lecture 9 review: Current continuous, charge does not build up I = neav d t/ t = neav d. ρ = E/j. V = IR. Conductor resistivity increases with temperature,
More informationResistors. Some substances are insulators. A battery will not make detectible current flow through them.
Resistors Some substances are insulators. A battery will not make detectible current flow through them. Many substances (lead, iron, graphite, etc.) will let current flow. For most substances that are
More informationExam 2 Solutions. PHY2054 Spring Prof. P. Kumar Prof. P. Avery March 5, 2008
Prof. P. Kumar Prof. P. Avery March 5, 008 Exam Solutions 1. Two cylindrical resistors are made of the same material and have the same resistance. The resistors, R 1 and R, have different radii, r 1 and
More informationELECTRICITY: CIRCUIT QUESTIONS
ELECTRICITY: CIRCUIT QUESTIONS Resistors in a DC circuit (2014;2) Sandra is investigating electrical circuits in the lab. She connects various resistors in combination. The current drawn from the supply
More informationEDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5  ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3 OUTCOME 1  D.C. CIRCUITS
EDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5  ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3 OUTCOME  D.C. CIRCUITS Be able to use circuit theory to determine voltage, current and resistance in direct
More informationObjectives 200 CHAPTER 4 RESISTANCE
Objectives Explain the differences among conductors, insulators, and semiconductors. Define electrical resistance. Solve problems using resistance, voltage, and current. Describe a material that obeys
More information4 th Grade Science Unit A: Physical Sciences Chapter 1: Electricity Lesson 1: How do charged objects behave?
4 th Grade Science Unit A: Physical Sciences Chapter 1: Electricity Lesson 1: How do charged objects behave? electric charge An electric charge is a property of some part of matter, described as positive
More informationGeneral Physics (PHY 2140)
General Physics (PHY 2140) Lecture 12 Electricity and Magnetism Magnetism Magnetic fields and force Application of magnetic forces http://www.physics.wayne.edu/~apetrov/phy2140/ Chapter 19 1 Department
More informationChapter 13: Electric Circuits
Chapter 13: Electric Circuits 1. A household circuit rated at 120 Volts is protected by a fuse rated at 15 amps. What is the maximum number of 100 watt light bulbs which can be lit simultaneously in parallel
More informationStudent Exploration: Circuits
Name: Date: Student Exploration: Circuits Vocabulary: ammeter, circuit, current, ohmmeter, Ohm s law, parallel circuit, resistance, resistor, series circuit, voltage Prior Knowledge Questions (Do these
More informationEnergy Transfer in a FlashLight. (Teacher Copy)
Energy Transfer in a FlashLight (Teacher Copy) Florida Sunshine State Standards Benchmark: SC.B. 1.3.1 AA The student identifies forms of energy and explains that they can be measured and compared. (Also
More informationPHYS 202 (DDE) Solved problems in electricity 1
PHYS 202 (DDE) Solved problems in electricity 1 1. Common static electricity involves charges ranging from nanocoulombs to microcoulombs. How many electrons are needed to form a charge of 2.00 nc? How
More informationResistors in Series and Parallel
Resistors in Series and Parallel Bởi: OpenStaxCollege Most circuits have more than one component, called a resistor that limits the flow of charge in the circuit. A measure of this limit on charge flow
More informationCircuit symbol. Each of the cells has a potential difference of 1.5 volts. Figure 1. Use the correct answer from the box to complete the sentence.
Q.(a) Draw one line from each circuit symbol to its correct name. Circuit symbol Name Diode Lightdependent resistor (LDR) Lamp Lightemitting diode (LED) (3) Figure shows three circuits. The resistors
More informationPhysics 1653 Exam 3  Review Questions
Physics 1653 Exam 3  Review Questions 3.0 Two uncharged conducting spheres, A and B, are suspended from insulating threads so that they touch each other. While a negatively charged rod is held near, but
More informationFigure 1. Experiment 3 The students construct the circuit shown in Figure 2.
Series and Parallel Circuits When two or more devices are connected to a battery in a circuit, there are a couple of methods by which they can be connected. One method is called a series connection and
More informationTransformer circuit calculations
Transformer circuit calculations This worksheet and all related files are licensed under the Creative Commons Attribution License, version 1.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/1.0/,
More informationSection 9: Resistors in Series and Parallel
Section 9: esistors in Series and Parallel In other words, if resistors are connected in series the total resistance is equal to the sum of the individual resistors. If all resistors have the same value
More informationUnit 1. 3. Describe what will happen if one of the bulbs in your diagram is removed from its socket. Explain your reasoning.
Unit 1 1. The diagram below shows a battery and two bulbs in sockets. Sketch connecting wires in a way that would allow both bulbs to light at the same time. 2. Using your diagram from question #1 above,
More informationUNIVERSITY OF NORTH CAROLINA AT CHARLOTTE Department of Electrical and Computer Engineering
UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE Department of Electrical and Computer Engineering EXPERIMENT 5 PARALLEL AND SERIESPARALLEL CIRCUIT CHARACTERISTICS OBJECTIVES This experiment will have the student
More informationPHYSICS 111 LABORATORY Experiment #3 Current, Voltage and Resistance in Series and Parallel Circuits
PHYSCS 111 LABORATORY Experiment #3 Current, Voltage and Resistance in Series and Parallel Circuits This experiment is designed to investigate the relationship between current and potential in simple series
More informationTemperature coefficient of resistivity
Temperature coefficient of resistivity ρ slope = α ρ = ρ o [ 1+ α(t To )] R = R o [1+ α(t T o )] T T 0 = reference temperature α = temperature coefficient of resistivity, units of (ºC) 1 For Ag, Cu, Au,
More informationLab 9: Energy Conservation in Circuits & Charge on a Capacitor
Part (1) Energy Conservation in Circuits OBJECTIVES In this part of the lab you will Write the energy conservation equation (loop rule) for several pairs of circuits Predict the relation between the currents
More informationAP1 Electricity. 1. A student wearing shoes stands on a tile floor. The students shoes do not fall into the tile floor due to
1. A student wearing shoes stands on a tile floor. The students shoes do not fall into the tile floor due to (A) a force of repulsion between the shoes and the floor due to macroscopic gravitational forces.
More information1. The diagram below represents magnetic lines of force within a region of space.
1. The diagram below represents magnetic lines of force within a region of space. 4. In which diagram below is the magnetic flux density at point P greatest? (1) (3) (2) (4) The magnetic field is strongest
More informationElectric Potential Difference
Name: Electric Potential Difference Read from Lesson 1 of the Current Electricity chapter at The Physics Classroom: http://www.physicsclassroom.com/class/circuits/u9l1a.html http://www.physicsclassroom.com/class/circuits/u9l1b.html
More informationLecture 10. Resistor Circuits, Batteries and EMF
Lecture 10. Resistor Circuits, Batteries and EMF Outline: Connection of Resistors: In Parallel and In Series. Batteries. Nonideal batteries: internal resistance. Potential distribution around a complete
More information1. A battery rating in amperehours gives the total amount of charge available in the battery.
CHPTE 5: Electric Currents and esistance esponses to Questions. battery rating in amperehours gives the total amount of charge available in the battery.. The chemical reactions within the cell cause electrons
More informationReview Questions PHYS 2426 Exam 2
Review Questions PHYS 2426 Exam 2 1. If 4.7 x 10 16 electrons pass a particular point in a wire every second, what is the current in the wire? A) 4.7 ma B) 7.5 A C) 2.9 A D) 7.5 ma E) 0.29 A Ans: D 2.
More informationi( t) L i( t) 56mH 1.1A t = τ ln 1 = ln 1 ln 1 6.67ms
Exam III PHY 49 Summer C July 16, 8 1. In the circuit shown, L = 56 mh, R = 4.6 Ω an V = 1. V. The switch S has been open for a long time then is suenly close at t =. At what value of t (in msec) will
More informationKirchhoff's Current Law (KCL)
Kirchhoff's Current Law (KCL) I. Charge (current flow) conservation law (the Kirchhoff s Current law) Pipe Pipe Pipe 3 Total volume of water per second flowing through pipe = total volume of water per
More information) 0.7 =1.58 10 2 N m.
Exam 2 Solutions Prof. Paul Avery Prof. Andrey Korytov Oct. 29, 2014 1. A loop of wire carrying a current of 2.0 A is in the shape of a right triangle with two equal sides, each with length L = 15 cm as
More informationDiodes have an arrow showing the direction of the flow.
The Big Idea Modern circuitry depends on much more than just resistors and capacitors. The circuits in your computer, cell phone, Ipod depend on circuit elements called diodes, inductors, transistors,
More informationSlide 1 / 26. Inductance. 2011 by Bryan Pflueger
Slide 1 / 26 Inductance 2011 by Bryan Pflueger Slide 2 / 26 Mutual Inductance If two coils of wire are placed near each other and have a current passing through them, they will each induce an emf on one
More informationSpecific resistance of conductors
Specific resistance of conductors This worksheet and all related files are licensed under the Creative Commons Attribution License, version 1.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/1.0/,
More informationCircuits. PHY2049: Chapter 27 1
Circuits PHY2049: Chapter 27 1 What You Already Know Nature of current Current density Drift speed and current Ohm s law Conductivity and resistivity Calculating resistance from resistivity Power in electric
More informationLast time : energy storage elements capacitor.
Last time : energy storage elements capacitor. Charge on plates Energy stored in the form of electric field Passive sign convention Vlt Voltage drop across real capacitor can not change abruptly because
More informationSeries and Parallel Circuits
Series and Parallel Circuits DirectCurrent Series Circuits A series circuit is a circuit in which the components are connected in a line, one after the other, like railroad cars on a single track. There
More informationTristan s Guide to: Solving Parallel Circuits. Version: 1.0 Written in 2006. Written By: Tristan Miller Tristan@CatherineNorth.com
Tristan s Guide to: Solving Parallel Circuits. Version: 1.0 Written in 2006 Written By: Tristan Miller Tristan@CatherineNorth.com Parallel Circuits. Parallel Circuits are a little bit more complicated
More informationSeries and Parallel Circuits
Direct Current (DC) Direct current (DC) is the unidirectional flow of electric charge. The term DC is used to refer to power systems that use refer to the constant (not changing with time), mean (average)
More informationPHYS245 Lab: Special resistors as Sensors: thermistor and photoresistor
Purpose PHYS245 Lab: Special resistors as Sensors: thermistor and photoresistor To demonstrate that some special resistors can be used as sensors Use a thermistor (a thermal resistor) to sense the temperature
More information1) Magnetic field lines come out of the south pole of a magnet and enter at the north pole.
Exam Name 1) Magnetic field lines come out of the south pole of a magnet and enter at the north pole. 2) Which of the following statements is correct? A) Earth's north pole is magnetic north. B) The north
More informationCurrent Limiting Power Resistors for HighPower LED Module Lighting Applications
Current Limiting Power Resistors for HighPower LED Module Lighting Applications PWR263 An ongoing trend toward miniaturization of virtually all electronics is accompanied by the demand for a reduction
More informationAPPLICATION NOTE Innovative shunt design techniques optimise power measurement accuracy
APPLICATION NOTE  012 Innovative shunt design techniques optimise power measurement accuracy Introduction Rapid developments in power conversion technologies combined with a need for better product efficiency
More informationCapacitance, Resistance, DC Circuits
This test covers capacitance, electrical current, resistance, emf, electrical power, Ohm s Law, Kirchhoff s Rules, and RC Circuits, with some problems requiring a knowledge of basic calculus. Part I. Multiple
More informationDC Motor Annotated Handout American Physical Society
DC Motor Annotated Handout American Physical Society A. What You Already Know Make a labeled drawing to show what you think is inside the motor. Write down how you think the motor works. Please do this
More informationCommercial MicrowaveTechnical Information
Commercial MicrowaveTechnical Information, 60 Hz model RCS10TS MCS10TS P2002401M P2002403M Due to possibility of personal injury or property damage, always contact an authorized technician for servicing
More informationPhysics 9 Fall 2009 Homework 8  Solutions
1. Chapter 34  Exercise 9. Physics 9 Fall 2009 Homework 8  s The current in the solenoid in the figure is increasing. The solenoid is surrounded by a conducting loop. Is there a current in the loop?
More informationElectricity. Short Answer Questions QUESTIONS
S.N O Electricity Short Answer Questions QUESTIONS 1 A child has drawn the electric circuit to study Ohm s law as shown in Figure. His teacher told that the circuit diagram needs correction. Study the
More informationEMI 3b: Changing Current and Bulb Brightness... 2
EMI 3b: Changing Current and Bulb Brightness... 2 EMI3b RT1: Changing Current and Bulb Brightness... 3 EMI3b WBT1: Changing Current and Bulb Brightness... 4 EMI3b CCT1: Changing Current and Bulb Brightness...
More informationElectrical circuits. Test yourself. 1 Complete this table. cell. ammeter
Electrical circuits 1 omplete this table. Symbol omponent cell ammeter 2 Draw a circuit diagram for each circuit. What name is given to each type of circuit?... circuit... circuit 3 Tick the lamps that
More informationΣ I in = Σ I out E = IR 1 + IR 2 FXA 2008 KIRCHHOFF S LAWS 1. Candidates should be able to : LAW 1 (K1)
UNT G482 Module 3 2.3.1 Series & Parallel Circuits Candidates should be able to : KRCHHOFF S LAWS 1 LAW 1 (K1) State Kirchhoff s second law and appreciate that it is a consequence of conservation of energy.
More informationQUICK START GUIDE FOR DEMONSTRATION CIRCUIT 735 LITHIUMION LINEAR BATTERY CHARGER WITH LDO REGULATOR
DESCRIPTION QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 735 LTC4063EDD Demonstration circuit 735 is a complete constantcurrent, constantvoltage battery charger for one LithiumIon cell and includes a
More informationMAGNETISM AND ELECTRICITY
MAGNETISM AND ELECTRICITY Survey/Posttest Date 1. Wait for your teacher before you begin. Your teacher will tell you how to complete this item. Object a. Sticks to magnets? b. Conducts electricity? Iron
More informationUnderstanding the pn Junction by Dr. Alistair Sproul Senior Lecturer in Photovoltaics The Key Centre for Photovoltaic Engineering, UNSW
Understanding the pn Junction by Dr. Alistair Sproul Senior Lecturer in Photovoltaics The Key Centre for Photovoltaic Engineering, UNSW The pn junction is the fundamental building block of the electronic
More information3. What atom s particle moves through a conductor material? 4. Which are the electric components of an elemental electric circuit?
1. What is electricity? 2. Write down the name of the atom s particles. 3. What atom s particle moves through a conductor material? 4. Which are the electric components of an elemental electric circuit?
More informationVocabulary Electrical Energy Negative charge Electric Field Conductor Insulator Voltage Current Circuit breaker Fuse. Chapter 17.
Introduction to Electricity Table of Contents Bellringer Write a definition for electric charge in your own words in your science journal. When do you experience electric charges most, in winter or in
More informationEðlisfræði 2, vor 2007
[ Assignment View ] [ Print ] Eðlisfræði 2, vor 2007 30. Inductance Assignment is due at 2:00am on Wednesday, March 14, 2007 Credit for problems submitted late will decrease to 0% after the deadline has
More informationElectronicsLab2.nb. Electronics Lab #2. Simple Series and Parallel Circuits
Electronics Lab #2 Simple Series and Parallel Circuits The definitions of series and parallel circuits will be given in this lab. Also, measurements in very simple series and parallel circuits will be
More information45. The peak value of an alternating current in a 1500W device is 5.4 A. What is the rms voltage across?
PHYS Practice Problems hapters 8 hapter 8. 45. The peak value of an alternating current in a 5W device is 5.4 A. What is the rms voltage across? The power and current can be used to find the peak voltage,
More informationExperiment #6, Series and Parallel Circuits, Kirchhoff s Laws
Physics 182 Spring 2013 Experiment #6 1 Experiment #6, Series and Parallel Circuits, Kirchhoff s Laws 1 Purpose Our purpose is to explore and validate Kirchhoff s laws as a way to better understanding
More informationSIMPLE ELECTRIC CIRCUITS
18 Preparatory Questions: (also read this guide sheet, which contains some of the answers!) 1. State Ohm s Law, defining every term in the equation. 2. If a bulb connected directly to a 6 V battery glows
More information