CHAPTER 5: ELECTROMAGNETIC INDUCTION


 Jerome Paul
 4 years ago
 Views:
Transcription
1 CHAPTER 5: ELECTROMAGNETIC INDUCTION PSPM II 2005/2006 NO An AC generator consists a coil of 30 turns with cross sectional area 0.05 m 2 and resistance 100 Ω. The coil rotates in a magnetic field 0.50 T at a frequency of 20.0 Hz. Calculate (a) The maximum induced emf. [Ans: ε max = V] (b) The maximum induced current. [Ans: I = A] PSPM II 2005/2006 NO. 12(A) 12. (a) A 400turn solenoid has a crosssectional area m 2 and length 20 cm carrying a current of 3.4 A. (i) Calculate the inductance of the solenoid. [Ans: L = H] Calculate the energy stored in the solenoid. [Ans: U = J] (iii) Calculate the induced emf in the solenoid if the current drops uniformly to zero in 55 ms. [Ans: ε = V] (iv) Explain why a spark jumps across the contact of a switch when the switch is disconnected. PSPM II 2006/2007 NO A metal rod moves perpendicularly through a 1.5 T uniform magnetic field at a speed of 2 cm s 1. If the length of the rod is 40 cm and its resistance is 3 Ω, calculate (a) the induced emf. [Ans: ε = V] (b) the induced current. [Ans: I = A] PSPM II 2006/2007 NO. 12(B) 12. (b) (i) State Lenz s law. FIGURE 10 PCH 1
2 The solenoid in FIGURE 10 is moved at constant velocity towards a fixed bar magnet. Using Lenz s law, determine the direction of the induced current through the resistor. Explain your answer. PSPM II 2007/2008 NO A coil has an inductance 45 mh and resistance 0.3 Ω. An emf of 12 V is applied to the coil until equilibrium current is achieved. (a) Calculate the energy stored in the coil. [Ans: U = 36 J] (b) State the change in the stored energy if the number of turns in the coil is increased. [Ans: U increases.] PSPM II 2007/2008 NO. 12(B) 12. (b) A 300turn solenoid of length 25 cm has a crosssectional area of 15 cm 2. A current of 8 A flows through the solenoid. Calculate (i) the magnetic field at the axis of the solenoid. [Ans: B = T] the total flux linkage passing through the solenoid. [Ans: Φ = Wb] (iii) The selfinductance of the solenoid. [Ans: L = H] (iv) the energy stored in the solenoid. [Ans: U = J] PSPM II 2008/2009 NO. 12(A) 12. (a) A coil of inductance L carrying a steady current I has an energy U. (i) Show that U = 1 2 LI2. Where is the energy being stored? PSPM II 2009/2010 NO A 600 turn solenoid is 0.01 m long. When the current is increased from 0 to 3 A in 0.4 s, the induced emf is V. Calculate the solenoid (a) inductance. [Ans: L = H] (b) crosssectional area. [Ans: A = m 2 ] PSPM II 2010/2011 NO (a) State Lenz s law. PCH 2
3 (b) FIGURE 2 FIGURE 2 shows two coils wrapped around a soft iron core. When the current I in coil A is decreasing, determine the direction of the induced current in coil B. Explain your answer. PSPM II 2010/2011 NO. 12(C) 12. (c) A 3.0 cm diameter wire coil with 25 turns and resistance Ω is placed coaxially inside a solenoid. The solenoid with diameter 6 cm, length 26 cm and 1000 turns carries a transient current 14 A s 1. (i) Calculate the maximum flux passing through the coil. [Ans: Φ coilmax = Weber] Calculate the current induced in the coil. [Ans: I induced = A] (iii) What is the effect on the induced current if the coil is slightly stretched? Explain your answer. [7 marks] PSPM II 2011/2012 NO (a) (i) Define magnetic flux. State Faraday s law of magnetic induction. [2 marks] (b) The plane of a coil of radius 0.20 m is parallel to the yzplane in a uniform magnetic field. The magnetic field is 0.40 T and in the positive xdirection. (i) Calculate the magnetic flux through the coil. [Ans: Φ B = Wb] The coil is then rotated clockwise about the yaxis, such that the normal of the coil is now 30 with respect to the xaxis. Calculate the average induced emf in the coil if the time taken for the rotation is 0.50 s. [Ans: ε = V] (c) A current of 5.0 A flows in a 400 turn solenoid that has a length of 30.0 cm and crosssectional area of m 2. Calculate (i) the inductance of the solenoid. [Ans: L = H] the energy stored in the solenoid. [Ans: U = J] (iii) the induced emf in the solenoid. [Ans: ε = 0 V] (iv) the induced emf in the solenoid if the current in the solenoid decreases uniformly to zero in 0.20 s. [Ans: ε = V] PCH 3
4 PSPM II 2012/2013 NO (a) A circular coil of N turns and radius r is rotated at constant frequency f in a uniform magnetic field B. The magnetic flux linkage of the coil is given by = Nπr 2 B cos(2πft) (i) Deduce the expression for emf induced in the coil. [Ans: ε = Nπr 2 B(2πf) sin(2πft)] If N = 100 turns, r = 5 cm, B = 1.0 T and f = 50 Hz, calculate the maximum emf generated. [Ans: ε max = V] (iii) A rotating coil generates a maximum emf of 500 V. Calculate the number of turns if the radius is 5 cm and rotates at the same frequency. [Ans: N = 203 turns] [7 marks] (b) A solenoid of length l = 10 cm, radius r = 2 cm has 1000 turns. (i) The current of the solenoid is lowered from 5 A to 0 A within 0.3 s. Calculate the magnitude of emf induced in the solenoid. [Ans: ε = V] A second coil with 50 turns is wound coaxially with the solenoid. Calculate the mutual inductance between the two. [Ans: M = H] ε (iii) What is the induced voltage ratio of the coil to the solenoid? [Ans: coil = 0. 05] ε solenoid PSPM II 2013/2014 NO (a) FIGURE 5 FIGURE 5 shows a bar moving on rails to the right with a velocity v in a uniform magnetic field directed out of the page. A resistor R connects the rails. (i) What is the direction of induced current in resistor R? Explain your answer. State TWO ways to increase the induced current with R fixed. (b) A rectangular coil of 60 turns, dimensions 0.1 m 0.1 m and total resistance 10 Ω, rotates with angular speed 30 rad s 1 about the yaxis in a 1.5 T magnetic field directed along the xaxis. Calculate the (i) maximum induced emf in the coil. [Ans: ε = 27 V] maximum rate of change of magnetic flux through the coil. [Ans: ( dφ B ) = dt max Wb s 1 ] [6 marks] (c) Two coaxial solenoids, P and Q have 400 and 700 turns respectively. A current of 3.5 A in coil P produces an average flux of 300 μwb through each turn of P and average flux of 90 μwb through each turn of Q. Calculate the PCH 4
5 (i) inductance of solenoid P. [Ans: L P = H] mutual inductance. [Ans: M 12 = H] PSPM II 2014/2015 NO (a) (i) Define magnetic flux. A 0.2 T magnetic field is directed parallel to the plane of a circular loop of radius 0.2 m. Calculate the magnetic flux through the loop. [Ans: φ = 0 Wb] [3 marks] (b) (i) A coil of 100 turns and area 0.5 cm 2 is placed in a changing magnetic field. The rate of change of magnetic field is 1.08 T s 1. Calculate the induced emf in the coil. [Ans: ε = V] A coil of N turns with an area m 2 is rotating at frequency 90 Hz in a uniform magnetic field 0.28 T. If the maximum induced emf in the coil is V, calculate the value of N. [Ans: N = 12] (c) A solenoid of radius 5 cm has 200 turns and length of 15 cm. Calculate the (i) inductance. [Ans: L = 2. 6 mh] rate at which current must change for it to produce an induced emf of 50 mv. [Ans: di dt = A s 1 ] (d) Two coaxial coils are wound around the same cylindrical core. The primary coil has 350 turns and the secondary coil has 200 turns. When the current in the primary coil is 6.5 A, the average flux through each turn of the secondary coil is Wb. Calculate the (i) mutual inductance of the pair of coils. [Ans: M = H] average flux through each turn of the primary coil when the current in the secondary coil is 1.5 A. [Ans: φ 1 = Wb] [3 marks] PCH 5
Chapter 5: Electromagnetic Induction
Chapter 5: Electromagnetic Induction 5.1 Magnetic Flux 5.1.1 Define and use magnetic flux Magnetic flux is defined as the scalar product between the magnetic flux density, B with the vector of the area,
More informationDemo: Solenoid and Magnet. Topics. Chapter 22 Electromagnetic Induction. EMF Induced in a Moving Conductor
Topics Chapter 22 Electromagnetic Induction EMF Induced in a Moving Conductor Magnetic Flux EMF Induced in a Moving Conductor Demo: Solenoid and Magnet v 1 EMF Induced in a Moving Conductor q Work done
More informationPHYS102 Previous Exam Problems. Induction
PHYS102 Previous Exam Problems CHAPTER 30 Induction Magnetic flux Induced emf (Faraday s law) Lenz law Motional emf 1. A circuit is pulled to the right at constant speed in a uniform magnetic field with
More informationChapter 21 Magnetic Induction Lecture 12
Chapter 21 Magnetic Induction Lecture 12 21.1 Why is it called Electromagnetism? 21.2 Magnetic Flux and Faraday s Law 21.3 Lenz s Law and WorkEnergy Principles 21.4 Inductance 21.5 RL Circuits 21.6 Energy
More informationPart 4: Electromagnetism. 4.1: Induction. A. Faraday's Law. The magnetic flux through a loop of wire is
1 Part 4: Electromagnetism 4.1: Induction A. Faraday's Law The magnetic flux through a loop of wire is Φ = BA cos θ B A B = magnetic field penetrating loop [T] A = area of loop [m 2 ] = angle between field
More informationApplication Of Faraday s Law
Application Of Faraday s Law Dr Miguel Cavero September 2, 2014 Application Of Faraday s Law September 2, 2014 1 / 23 The PHYS120 Exam will be divided into three sections as follows: Section A: Short Questions
More information1 Fig. 3.1 shows the variation of the magnetic flux linkage with time t for a small generator. magnetic. flux linkage / Wbturns 1.
1 Fig. 3.1 shows the variation of the magnetic flux linkage with time t for a small generator. 2 magnetic 1 flux linkage / 0 10 2 Wbturns 1 2 5 10 15 t / 10 3 s Fig. 3.1 The generator has a flat coil
More informationChapter 23 Magnetic Flux and Faraday s Law of Induction
Chapter 23 Magnetic Flux and Faraday s Law of Induction Recall: right hand rule 2 10/28/2013 Units of Chapter 23 Induced Electromotive Force Magnetic Flux Faraday s Law of Induction Lenz s Law Mechanical
More informationInduction_P1. 1. [1 mark]
Induction_P1 1. [1 mark] Two identical circular coils are placed one below the other so that their planes are both horizontal. The top coil is connected to a cell and a switch. The switch is closed and
More informationPHYSICS  GIANCOLI CALC 4E CH 29: ELECTROMAGNETIC INDUCTION.
!! www.clutchprep.com CONCEPT: ELECTROMAGNETIC INDUCTION A coil of wire with a VOLTAGE across each end will have a current in it  Wire doesn t HAVE to have voltage source, voltage can be INDUCED i V Common
More information18  ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS ( Answers at the end of all questions ) Page 1
( Answers at the end of all questions ) Page ) The self inductance of the motor of an electric fan is 0 H. In order to impart maximum power at 50 Hz, it should be connected to a capacitance of 8 µ F (
More informationVersion 001 HW 22 EM Induction C&J sizemore (21301jtsizemore) 1
Version 001 HW 22 EM Induction C&J sizemore (21301jtsizemore) 1 This printout should have 35 questions. Multiplechoice questions may continue on the next column or page find all choices before answering.
More informationELECTROMAGNETIC INDUCTION AND FARADAY S LAW
ELECTROMAGNETIC INDUCTION AND FARADAY S LAW Magnetic Flux The emf is actually induced by a change in the quantity called the magnetic flux rather than simply py by a change in the magnetic field Magnetic
More informationElectricity & Optics
Physics 24100 Electricity & Optics Lecture 16 Chapter 28 sec. 13 Fall 2017 Semester Professor Koltick Magnetic Flux We define magnetic flux in the same way we defined electric flux: φ e = n E da φ m =
More informationCHAPTER 5 ELECTROMAGNETIC INDUCTION
CHAPTER 5 ELECTROMAGNETIC INDUCTION 1 Quick Summary on Previous Concepts Electrostatics Magnetostatics Electromagnetic Induction 2 Cases of Changing Magnetic Field Changing Field Strength in a Loop A Loop
More informationQuestion 6.1: Predict the direction of induced current in the situations described by the following Figs. 6.18(a) to (f ). (a) (b) (c) (d) (e) (f) The direction of the induced current in a closed loop
More informationPHYS 241 EXAM #2 November 9, 2006
1. ( 5 points) A resistance R and a 3.9 H inductance are in series across a 60 Hz AC voltage. The voltage across the resistor is 23 V and the voltage across the inductor is 35 V. Assume that all voltages
More informationElectromagnetic Induction Faraday s Law Lenz s Law SelfInductance RL Circuits Energy in a Magnetic Field Mutual Inductance
Lesson 7 Electromagnetic Induction Faraday s Law Lenz s Law SelfInductance RL Circuits Energy in a Magnetic Field Mutual Inductance Oscillations in an LC Circuit The RLC Circuit Alternating Current Electromagnetic
More informationPhysics Notes for Class 12 chapter 6 ELECTROMAGNETIC I NDUCTION
1 P a g e Physics Notes for Class 12 chapter 6 ELECTROMAGNETIC I NDUCTION Whenever the magnetic flux linked with an electric circuit changes, an emf is induced in the circuit. This phenomenon is called
More informationElectromagnetic Induction & Inductors
Electromagnetic Induction & Inductors 1 Revision of Electromagnetic Induction and Inductors (Much of this material has come from Electrical & Electronic Principles & Technology by John Bird) Magnetic Field
More informationChapter 30. Inductance
Chapter 30 Inductance Self Inductance When a time dependent current passes through a coil, a changing magnetic flux is produced inside the coil and this in turn induces an emf in that same coil. This induced
More informationHandout 10: Inductance. SelfInductance and inductors
1 Handout 10: Inductance SelfInductance and inductors In Fig. 1, electric current is present in an isolate circuit, setting up magnetic field that causes a magnetic flux through the circuit itself. This
More information21 MAGNETIC FORCES AND MAGNETIC FIELDS
CHAPTER 1 MAGNETIC FORCES AND MAGNETIC FIELDS ANSWERS TO FOCUS ON CONCEPTS QUESTIONS 1 (d) RightHand Rule No 1 gives the direction of the magnetic force as x for both drawings A and B In drawing C, the
More informationa) headon view b) side view c) side view Use the right hand rule for forces to confirm the direction of the force in each case.
Electromagnetism Magnetic Force on a Wire Magnetic Field around a Bar Magnet Direction of magnetic field lines: the direction that the North pole of a small test compass would point if placed in the field
More informationElectromagnetism IB 12
Electromagnetism Magnetic Field around a Bar Magnet Direction of magnetic field lines: the direction that the North pole of a small test compass would point if placed in the field (N to S) What is the
More informationElectromagnetic Induction Practice Problems Homework PSI AP Physics B
Electromagnetic Induction Practice Problems Homework PSI AP Physics B Name Multiple Choice Questions 1. A square loop of wire is placed in a uniform magnetic field perpendicular to the magnetic lines.
More informationLouisiana State University Physics 2102, Exam 3, November 11, 2010.
Name: Instructor: Louisiana State University Physics 2102, Exam 3, November 11, 2010. Please be sure to write your name and class instructor above. The test consists of 3 questions (multiple choice), and
More informationChapter 32. Inductance
Chapter 32 Inductance Joseph Henry 1797 1878 American physicist First director of the Smithsonian Improved design of electromagnet Constructed one of the first motors Discovered selfinductance Unit of
More informationFaraday's Law ds B B G G ΦB B ds Φ ε = d B dt
Faraday's Law ds ds ε= d Φ dt Φ Global Review Electrostatics» motion of q in external Efield» Efield generated by Σq i Magnetostatics» motion of q and i in external field» field generated by I Electrodynamics»
More informationAP Physics 2  Ch 20 Practice
Class: Date: AP Physics 2  Ch 20 Practice Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A coil is wrapped with 300 turns of wire on the perimeter of
More informationAP Physics C. Inductance. Free Response Problems
AP Physics C Inductance Free Response Problems 1. Two toroidal solenoids are wounded around the same frame. Solenoid 1 has 800 turns and solenoid 2 has 500 turns. When the current 7.23 A flows through
More informationProblem Solving: Faraday s Law & Inductance. Faraday s Law
MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Physics: 8.02 Problem Solving: Faraday s Law & Inductance Section Table Names Faraday s Law In Chapter 10 of the 8.02 Course Notes, we have seen that
More informationInduction and Inductance
Welcome Back to Physics 1308 Induction and Inductance Michael Faraday 22 September 1791 25 August 1867 Announcements Assignments for Tuesday, November 6th:  Reading: Chapter 30.630.8  Watch Videos:
More informationUniversity Physics (Prof. David Flory) Chapt_31 Tuesday, July 31, 2007
Name: Date: 1. Suppose you are looking into one end of a long cylindrical tube in which there is a uniform electric field, pointing away from you. If the magnitude of the field is decreasing with time
More informationFaraday s Law of Electromagnetic Induction
Faraday s Law of Electromagnetic Induction 2.1 Represent and reason The rectangular loop with a resistor is pulled at constant velocity through a uniform external magnetic field that points into the paper
More informationSelfinductance A timevarying current in a circuit produces an induced emf opposing the emf that initially set up the timevarying current.
Inductance Selfinductance A timevarying current in a circuit produces an induced emf opposing the emf that initially set up the timevarying current. Basis of the electrical circuit element called an
More informationPHYS 2326 University Physics II Class number
PHYS 2326 University Physics II Class number HOMEWORK SET #1 CHAPTERS: 27,28,29 (DUE JULY 22, 2013) Ch. 27.======================================================= 1. A rod of 2.0m length and a square
More informationTactics: Evaluating line integrals
Tactics: Evaluating line integrals Ampère s law Whenever total current I through passes through an area bounded by a closed curve, the line integral of the magnetic field around the curve is given by Ampère
More informationChapter 30 INDUCTANCE. Copyright 2012 Pearson Education Inc.
Chapter 30 INDUCTANCE Goals for Chapter 30 To learn how current in one coil can induce an emf in another unconnected coil To relate the induced emf to the rate of change of the current To calculate the
More informationChapter 23: Magnetic Flux and Faraday s Law of Induction
Chapter 3: Magnetic Flux and Faraday s Law of Induction Answers Conceptual Questions 6. Nothing. In this case, the break prevents a current from circulating around the ring. This, in turn, prevents the
More information1 (a) Define magnetic flux [1]
1 (a) Define magnetic flux..... [1] (b) Fig. 4.1 shows a generator coil of 5 turns and crosssectional area 2.5 1 3 m 2 placed in a magnetic field of magnetic flux density.35 T. The plane of the coil is
More informationRecap (1) Maxwell s Equations describe the electric field E and magnetic field B generated by stationary charge density ρ and current density J:
Class 13 : Induction Phenomenon of induction and Faraday s Law How does a generator and transformer work? Self and mutual inductance Energy stored in Bfield Recap (1) Maxwell s Equations describe the
More informationMagnetism. and its applications
Magnetism and its applications Laws of Magnetism 1) Like magnetic poles repel, and 2) unlike poles attract. Magnetic Direction and Strength Law 3  Magnetic force, either attractive or repelling varies
More informationPHYS 1442 Section 004 Lecture #14
PHYS 144 Section 004 Lecture #14 Wednesday March 5, 014 Dr. Chapter 1 Induced emf Faraday s Law Lenz Law Generator 3/5/014 1 Announcements After class pickup test if you didn t Spring break Mar 1014 HW7
More informationInductance, RL and RLC Circuits
Inductance, RL and RLC Circuits Inductance Temporarily storage of energy by the magnetic field When the switch is closed, the current does not immediately reach its maximum value. Faraday s law of electromagnetic
More informationElectromagnetic Induction (Chapters 3132)
Electromagnetic Induction (Chapters 313) The laws of emf induction: Faraday s and Lenz s laws Inductance Mutual inductance M Self inductance L. Inductors Magnetic field energy Simple inductive circuits
More informationCh. 23 Electromagnetic Induction, AC Circuits, And Electrical Technologies
Ch. 23 Electromagnetic Induction, AC Circuits, And Electrical Technologies Induced emf  Faraday s Experiment When a magnet moves toward a loop of wire, the ammeter shows the presence of a current When
More informationPHYSICS Fall Lecture 15. Electromagnetic Induction and Faraday s Law
PHYSICS 1444001 Fall 2012 Lecture 15 Electromagnetic Induction and Faraday s Law A current can be produced by a changing magnetic field First shown in an experiment by Michael Faraday Induced emf A primary
More informationChapter 27, 28 & 29: Magnetism & Electromagnetic Induction. Magnetic flux Faraday s and Lenz s law Electromagnetic Induction Ampere s law
Chapter 27, 28 & 29: Magnetism & Electromagnetic Induction Magnetic flux Faraday s and Lenz s law Electromagnetic Induction Ampere s law 1 Magnetic Flux and Faraday s Law of Electromagnetic Induction We
More informationChapter 23 Magnetic Flux and Faraday s Law of Induction
Chapter 23 Magnetic Flux and Faraday s Law of Induction 1 Overview of Chapter 23 Induced Electromotive Force Magnetic Flux Faraday s Law of Induction Lenz s Law Mechanical Work and Electrical Energy Generators
More informationPhysics 240 Fall 2005: Exam #3 Solutions. Please print your name: Please list your discussion section number: Please list your discussion instructor:
Physics 4 Fall 5: Exam #3 Solutions Please print your name: Please list your discussion section number: Please list your discussion instructor: Form #1 Instructions 1. Fill in your name above. This will
More informationPHYS 1444 Section 003 Lecture #18
PHYS 1444 Section 003 Lecture #18 Wednesday, Nov. 2, 2005 Magnetic Materials Ferromagnetism Magnetic Fields in Magnetic Materials; Hysteresis Induced EMF Faraday s Law of Induction Lenz s Law EMF Induced
More informationChapter 22. Induction
Chapter 22 Induction Induced emf A current can be produced by a changing magnetic field First shown in an experiment by Michael Faraday A primary coil is connected to a battery A secondary coil is connected
More informationChapter 32. Inductance
Chapter 32 Inductance Inductance Selfinductance A timevarying current in a circuit produces an induced emf opposing the emf that initially set up the timevarying current. Basis of the electrical circuit
More informationDO PHYSICS ONLINE MOTORS AND GENERATORS FARADAY S LAW ELECTROMAGNETIC INDUCTION
DO PHYSICS ONLINE MOTORS AND GENERATORS FARADAY S LAW ELECTROMAGNETIC INDUCTION English Michael Faraday (1791 1867) who experimented with electric and magnetic phenomena discovered that a changing magnetic
More informationExam 2 Solutions. PHY2054 Spring Prof. Paul Avery Prof. Pradeep Kumar Mar. 18, 2014
Exam 2 Solutions Prof. Paul Avery Prof. Pradeep Kumar Mar. 18, 2014 1. A series circuit consists of an open switch, a 6.0 Ω resistor, an uncharged 4.0 µf capacitor and a battery with emf 15.0 V and internal
More informationC. Incorrect! Use the formula for magnetic flux. This is the product of magnetic field, times area, times the angle between them.
AP Physics  Problem Drill 17: Electromagnetism Instruction: (1) Read the problem statement and answer choices carefully (2) Work the problems on paper as 1. A house has a wall that has an area of 28 m
More informationElectromagnetic Induction and Faraday s Law
Electromagnetic Induction and Faraday s Law Induced EMF Almost 200 years ago, Faraday looked for evidence that a magnetic field would induce an electric current with this apparatus: He found no evidence
More informationElectromagnetic Induction
Electromagnetic Induction 1 The magnet is very fragile. Exercise caution while dealing with the bar magnet. Introduction A current flow creates the magnetic field that is shown by the previous lab. Then,
More informationMagnetic field creation (example of a problem)
1 Magnetic field creation (example of a problem) Three long, straight wires are parallel to each other and perpendicular to the plane of the paper. Their mutual location is shown in Figure below. The currents
More informationElectromagnetic Induction
Chapter II Electromagnetic Induction Day 1 Induced EMF, Faraday s Law and Lenz s Law Sections 211 to 212 Electromotive Force Electromotive force (EMF ore) is a misnomer, as it is not really a force but
More informationChapter 9 FARADAY'S LAW Recommended Problems:
Chapter 9 FARADAY'S LAW Recommended Problems: 5,7,9,10,11,13,15,17,20,21,28,29,31,32,33,34,49,50,52,58,63,64. Faraday's Law of Induction We learned that e. current produces magnetic field. Now we want
More informationELECTRO MAGNETIC INDUCTION
ELECTRO MAGNETIC INDUCTION 1) A Circular coil is placed near a current carrying conductor. The induced current is anti clock wise when the coil is, 1. Stationary 2. Moved away from the conductor 3. Moved
More informationPhysics 1308 Exam 2 Summer 2015
Physics 1308 Exam 2 Summer 2015 E201 2. The direction of the magnetic field in a certain region of space is determined by firing a test charge into the region with its velocity in various directions in
More informationSliding Conducting Bar
Motional emf, final For equilibrium, qe = qvb or E = vb A potential difference is maintained between the ends of the conductor as long as the conductor continues to move through the uniform magnetic field
More informationCURRENTCARRYING CONDUCTORS / MOVING CHARGES / CHARGED PARTICLES IN CIRCULAR ORBITS
PHYSICS A2 UNIT 4 SECTION 4: MAGNETIC FIELDS CURRENTCARRYING CONDUCTORS / MOVING CHARGES / CHARGED PARTICLES IN CIRCULAR ORBITS # Questions MAGNETIC FLUX DENSITY 1 What is a magnetic field? A region in
More informationPhysics 11b Lecture #13
Physics 11b Lecture #13 Faraday s Law S&J Chapter 31 Midterm #2 Midterm #2 will be on April 7th by popular vote Covers lectures #8 through #14 inclusive Textbook chapters from 27 up to 32.4 There will
More informationINDUCTANCE Self Inductance
NDUTANE 3. Self nductance onsider the circuit shown in the Figure. When the switch is closed the current, and so the magnetic field, through the circuit increases from zero to a specific value. The increasing
More informationPhysics 240 Fall 2005: Exam #3. Please print your name: Please list your discussion section number: Please list your discussion instructor:
Physics 240 Fall 2005: Exam #3 Please print your name: Please list your discussion section number: Please list your discussion instructor: Form #1 Instructions 1. Fill in your name above 2. This will be
More informationGeneral Physics (PHY 2140)
General Physics (PHY 2140) Lecture 15 Electricity and Magnetism Magnetism Applications of magnetic forces Induced voltages and induction Magnetic flux and induced emf Faraday s law http://www.physics.wayne.edu/~apetrov/phy2140/
More informationUniversity Physics Volume II Unit 2: Electricity and Magnetism Chapter 13: Electromagnetic Induction Conceptual Questions
University Physics Volume II Conceptual Questions 1. A stationary coil is in a magnetic field that is changing with time. Does the emf induced in the coil depend on the actual values of the magnetic field?
More informationRevision Guide for Chapter 15
Revision Guide for Chapter 15 Contents tudent s Checklist Revision otes Transformer... 4 Electromagnetic induction... 4 Generator... 5 Electric motor... 6 Magnetic field... 8 Magnetic flux... 9 Force on
More informationFaraday s Law. Underpinning of Much Technology
Module 21: Faraday s Law 1 Faraday s Law Fourth (Final) Maxwell s Equation Underpinning of Much Technology 2 Demonstration: Falling Magnet 3 Magnet Falling Through a Ring Link to movie Falling magnet slows
More informationxˆ z ˆ. A second vector is given by B 2xˆ yˆ 2z ˆ.
Directions for all homework submissions Submit your work on plainwhite or engineering paper (not lined notebook paper). Write each problem statement above each solution. Report answers using decimals
More informationChapter 30 Inductance and Electromagnetic Oscillations
Chapter 30 Inductance and Electromagnetic Oscillations Units of Chapter 30 30.1 Mutual Inductance: 1 30.2 SelfInductance: 2, 3, & 4 30.3 Energy Stored in a Magnetic Field: 5, 6, & 7 30.4 LR Circuit: 8,
More informationChapter 30. Induction and Inductance
Chapter 30 Induction and Inductance 30.2: First Experiment: 1. A current appears only if there is relative motion between the loop and the magnet (one must move relative to the other); the current disappears
More informationLast time. Ampere's Law Faraday s law
Last time Ampere's Law Faraday s law 1 Faraday s Law of Induction (More Quantitative) The magnitude of the induced EMF in conducting loop is equal to the rate at which the magnetic flux through the surface
More informationFXA 2008 Φ = BA. Candidates should be able to : Define magnetic flux. Define the weber (Wb). Select and use the equation for magnetic flux :
1 Candidates should be able to : Define magnetic flux. Define the weber (Wb). Select and use the equation for magnetic flux : Φ = BAcosθ MAGNETIC FLUX (Φ) As we have already stated, a magnetic field is
More informationPhysics 1302W.400 Lecture 33 Introductory Physics for Scientists and Engineering II
Physics 1302W.400 Lecture 33 Introductory Physics for Scientists and Engineering II In today s lecture, we will discuss generators and motors. Slide 301 Announcement Quiz 4 will be next week. The Final
More informationPHYSICS. Chapter 30 Lecture FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E RANDALL D. KNIGHT
PHYSICS FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E Chapter 30 Lecture RANDALL D. KNIGHT Chapter 30 Electromagnetic Induction IN THIS CHAPTER, you will learn what electromagnetic induction is
More informationLecture 33. PHYC 161 Fall 2016
Lecture 33 PHYC 161 Fall 2016 Faraday s law of induction When the magnetic flux through a single closed loop changes with time, there is an induced emf that can drive a current around the loop: Recall
More informationCHAPTER 4: MAGNETIC FIELD
CHAPTER 4: MAGNETIC FIELD PSPM II 2005/2006 NO. 4 4. FIGURE 3 A copper rod of mass 0.08 kg and length 0.20 m is attached to two thin current carrying wires, as shown in FIGURE 3. The rod is perpendicular
More informationQuestion 1. Question 2
Question 1 Figure 2926 shows cross sections of two long straight wires; the lefthand wire carries current i 1 directly out of the page. The net magnetic field due to the two currents is to be zero at
More informationTutorial Sheet Fig. Q1
Tutorial Sheet  04 1. The magnetic circuit shown in Fig. Q1 has dimensions A c = A g = 9 cm 2, g = 0.050 cm, l c = 30 cm, and N = 500 turns. Assume the value of the relative permeability,µ r = 70,000
More informationAP Physics C  E & M
AP Physics C  E & M Electromagnetic Induction 20170714 www.njctl.org Table of Contents: Electromagnetic Induction Click on the topic to go to that section. Induced EMF Magnetic Flux and Gauss's Law
More informationLecture 29: MON 02 NOV
Physics 2113 Jonathan Dowling Lecture 29: MON 02 NOV Induction and Inductance I Fender Stratocaster Solenoid Pickup F a r a d a y ' s E x p e r i m e n t s I n a s e r i e s o f e x p e r i m e n t s,
More informationYell if you have any questions
Class 31: Outline Hour 1: Concept Review / Overview PRS Questions possible exam questions Hour : Sample Exam Yell if you have any questions P31 1 Exam 3 Topics Faraday s Law Self Inductance Energy Stored
More informationActive Figure 32.3 (SLIDESHOW MODE ONLY)
RL Circuit, Analysis An RL circuit contains an inductor and a resistor When the switch is closed (at time t = 0), the current begins to increase At the same time, a back emf is induced in the inductor
More informationChapter 20: Electromagnetic Induction. PHY2054: Chapter 20 1
Chapter 20: Electromagnetic Induction PHY2054: Chapter 20 1 Electromagnetic Induction Magnetic flux Induced emf Faraday s Law Lenz s Law Motional emf Magnetic energy Inductance RL circuits Generators and
More informationChapter 12. Magnetism and Electromagnetism
Chapter 12 Magnetism and Electromagnetism 167 168 AP Physics Multiple Choice Practice Magnetism and Electromagnetism SECTION A Magnetostatics 1. Four infinitely long wires are arranged as shown in the
More informationChapter 30 Inductance
Chapter 30 Inductance In this chapter we investigate the properties of an inductor in a circuit. There are two kinds of inductance mutual inductance and selfinductance. An inductor is formed by taken
More informationChapter 31. Faraday s Law
Chapter 31 Faraday s Law 1 Ampere s law Magnetic field is produced by time variation of electric field dφ B ( I I ) E d s = µ o + d = µ o I+ µ oεo ds E B 2 Induction A loop of wire is connected to a sensitive
More information(a) zero. B 2 l 2. (c) (b)
1. Two identical coaxial circular loops carry equal currents circulating in the same direction: (a) The current in each coil decrease as the coils approach each other. (b) The current in each coil increase
More informationRevision Guide for Chapter 15
Revision Guide for Chapter 15 Contents Revision Checklist Revision otes Transformer...4 Electromagnetic induction...4 Lenz's law...5 Generator...6 Electric motor...7 Magnetic field...9 Magnetic flux...
More informationChapters 34,36: Electromagnetic Induction. PHY2061: Chapter
Chapters 34,36: Electromagnetic Induction PHY2061: Chapter 3435 1 Electromagnetic Induction Magnetic flux Induced emf Faraday s Law Lenz s Law Motional emf Magnetic energy Inductance RL circuits Generators
More informationPhysics 6B Summer 2007 Final
Physics 6B Summer 2007 Final Question 1 An electron passes through two rectangular regions that contain uniform magnetic fields, B 1 and B 2. The field B 1 is stronger than the field B 2. Each field fills
More informationPhysics 2401 Summer 2, 2008 Exam III
Physics 2401 Summer 2, 2008 Exam e = 1.60x1019 C, m(electron) = 9.11x1031 kg, ε 0 = 8.845x1012 C 2 /Nm 2, k e = 9.0x10 9 Nm 2 /C 2, m(proton) = 1.67x1027 kg. n = nano = 109, µ = micro = 106, m =
More informationSlide 1 / 24. Electromagnetic Induction 2011 by Bryan Pflueger
Slide 1 / 24 Electromagnetic Induction 2011 by Bryan Pflueger Slide 2 / 24 Induced Currents If we have a galvanometer attached to a coil of wire we can induce a current simply by changing the magnetic
More informationLecture 29: MON 03 NOV
Physics 2113 Jonathan Dowling Lecture 29: MON 03 NOV Ch30.1 4 Induction and Inductance I Fender Stratocaster Solenoid Pickup Magnetic Circuit Breaker As the normal operating or "rated" current flows through
More informationPhysics 54 Lecture March 1, Microquiz problems (magnetic fields and forces) Magnetic dipoles and their interaction with magnetic fields
Physics 54 Lecture March 1, 2012 OUTLINE Microquiz problems (magnetic fields and forces) Magnetic dipoles and their interaction with magnetic fields Electromagnetic induction Introduction to electromagnetic
More information