# Electrostatics Problems

Save this PDF as:

Size: px
Start display at page:

## Transcription

1 Name AP Physics B Electrostatics Problems Date Mrs. Kelly 1. How many excess electrons are contained in a charge of 30 C? 2. Calculate and compare the gravitational and electrostatic force between an electron and a proton separated by a distance of 1 x m. 3. Two charged balls are 20 cm apart. They are moved and the force between them is found to have been tripled. How far apart are they now? 4. What is the magnitude of the electrostatic force of attraction between an iron nucleus (q=+26e) and its innermost electron if the distance between them is 1.5 x m? 5. Three charged particles are arranged in a line as shown in the diagram below. What is the net electrostatic force on particle 3 due to the other two particles? 6. Particles of charge +70, +48, and 80 C are placed in a line as shown below. The center of one is 0.35 m from each of the others. Calculate the net force on the +70 C charge due to the other two. 7. Calculate the net electrostatic force on charge Q 2 due to charges Q 1 and Q 3 shown in the diagram below. 8. Four charges, each of +5 C, are placed at the corners of a square of 30 cm sides. Calculate the force on the charge located in the lower right corner of the square. 9. What is the magnitude and direction of the electrostatic force on an electron in a uniform electric field of strength 3500 N/C that points due east? 10. A proton is released in a uniform electric field and it experiences an electric force of 3.2 x N toward the south. What are the magnitude and direction of the electric field? 11. What is the magnitude of the acceleration experienced by an electron in an electric field of 600 N/C? 12. An electron is released from rest in a uniform electric field and accelerates to the north at a rate of 125 m/s 2. What is the magnitude and direction of the electric field? 13. A 1 x 10-9 kg spherical water drop that carries a charge of C is released from rest in an electric field of 125 V/m. What is the acceleration of the particle due to the electric field? 14. Calculate the magnitude and direction of the electric field at a point P which is 0.30 m to the right of a point charge Q = -3.0 x 10-6 C.

2 15. What is the magnitude and direction of the electric field at a point midway between a 8.0 C and a +6.0 C charge 4.0 cm apart? 16. Two point charges are separated by a distance of 0.10 m. One has a charge of 25 C and the other +50 C. a) What is the direction and magnitude of the electric field at a point P in between them, that is 0.02 m from the negative charge? b) If an electron is placed at rest at P, what will its acceleration (magnitude and direction) be? 17. The electric field midway between two equal but opposite point charges is 1750 N/C, and the distance between them is 0.16 m. What is the magnitude of the charge on each? 18. Determine the magnitude and direction of the electric field at the point P shown in the diagram below. The two charges are separated by a distance of 2a and the point P is a distance x out on the perpendicular bisector of the line adjoining them. Express your answers in terms of Q, x, a and k 19. Three charges, +3 C, -6 C and 9 C, are placed in order along a straight line with 20 cm between adjacent charges. Calculate the electric field at the following positions: a) Midway between the +3 C and 6 C charges. b) On the extension of the straight line and 20 cm beyond the 9 C charge. 20. Four charges, each of +5 C, are placed at the corners of a square of 30 cm sides. a) Calculate the electric field at the center of the square. b) Calculate the electric field at the center of one of the sides of the square. 21. How much work is done by the electric force in moving a 8.6 C charge from ground to a point whose potential is +75 V? 22. How much work is done by the electric force in moving a proton from a point with a potential of +100 V to a point where it is 50 V? Express your answer in both joules and electronvolts. 23. An electron gains 3.45 x J of kinetic energy when it is accelerated by an electric field in a computer monitor from plate A to plate B. What is the potential difference between the plates and which is at a higher potential? 24. A lightening flash transfers 4.0 C of charge and 4.2 MJ of energy to the Earth. Through what potential difference did the lightening travel? 25. How strong is the electric field between two parallel plates 5.2 mm apart if the potential difference between them is 220 V? 26. An electric field of 640 V/m is desired between two parallel plates 11.0 mm apart. How large a voltage should be applied? 27. What is the speed of a proton whose kinetic energy is 28.0 MeV? 28. What is the potential difference required to accelerate a proton from rest to a speed of 1 x 10 6 m/s? 29. How much kinetic energy will an electron gain if it falls through a potential difference of 21,000 V? 30. What potential difference is needed to give helium nucleus (q = 2e) 65.0 kev of kinetic energy?

3 31. What is the electric potential 15.0 cm from a 4.00 C point charge? 32. An electron starts from rest 72.5 cm from a fixed point charge with Q = C. How fast will the electron be moving when it is very far away? 33. Find the total electric potential due to the two point charges shown below at location A. 34. Find the total electric potential due to the two point charges shown below at location B. 35. Two point charges, Q 1 = nc and Q 2 = nc, are separated by 35.0 cm. a) What is the electric potential midway between the two charges? b) What is the potential energy of the pair of charges? 36. A point charge of 9.00 x 10-9 C is located at the origin. How much work is required to bring a positive charge of 3.00 x 10-9 C from infinity to the location x = 30.0 cm? 37. Three charges are situated at corners of a rectangle as shown in the diagram below. How much energy would be expended in moving the 8.0 C charge to infinity? 38. A +30 C charge is placed 32 cm from an identical +30 C charge. How much work would be required to move a C test charge from a point midway between them to a point 10 cm closer to either of the charges? 39. Consider point a which is 70 cm north of a 3.8 C point charge, and point b which is 80 cm west of the charge. Determine: a) The potential difference between points a and b (V b V a ) b) The difference in the electric field between points a and b (E b E a ) 40. The potential difference between two parallel wires in air is 120 V. They carry equal and opposite charge of magnitude 95 pc. What is the capacitance of the two wires? 41. How much charge flows from a 12.0 V battery when it is connected to a 9.00 F capacitor? 42. What is the capacitance of a pair of circular plates with radius of 5.0 cm separated by 3.2 mm of air? 43. An electric field of 8.50 x 10 5 V/m is desired between two parallel plates each of area 35.0 cm 2 and separated by 2.45 mm of air? What charge must be on each plate?

4 44. How strong is the electric field between the plates of a 0.80 F air-gap capacitor if they are 2.0 mm apart and each has a charge of 72 C? V is applied to a 7200 pf capacitor. How much energy is stored? 46. A homemade capacitor is assembled by placing two 9-inch pie plates 10 cm apart and connecting them to the opposite terminals of a 9 V battery. Estimate the following for the homemade capacitor: a) the capacitance b) the charge on each plates c) the electric field halfway between the plates d) the work done by the battery to charge the plates e) which of the above values change if a dielectric is inserted between the plates? 47. How does the energy stored in a capacitor change if a) the potential difference is doubled b) the charge on each plate is doubled c) the separation of the plates is doubled, as the capacitor remains connected to a battery 48. It takes 8.5 J of energy to move a 3.0 C charge from one plate of a 9.0 F capacitor to the other. How much charge is on each plate? 49. An uncharged capacitor is connected to a 24.0 V battery until it is fully charged, after which it is disconnected from the battery. A slab of paraffin ( =2.5) is then inserted between the plates. What will now by the voltage between the plates?

5 THE END!

### Einstein Classes, Unit No. 102, 103, Vardhman Ring Road Plaza, Vikas Puri Extn., Outer Ring Road, New Delhi , Ph. : ,

1 E L E C T R O S TAT I C S 1. Define lines of forces and write down its properties. Draw the lines of force to represent (i) uniform electric field (ii) positive charge (iii) negative charge (iv) two

### PHYSICS 212 ELECTRICAL ENERGY AND CAPACITANCE WORKBOOK ANSWERS

PHYSICS 212 CHAPTER 16 ELECTRICAL ENERGY AND CAPACITANCE WORKBOOK ANSWERS STUDENT S FULL NAME (By placing your name above and submitting this for credit you are affirming this to be predominantly your

### Physics 202 Spring 2010 Practice Questions for Chapters 21-24

Note: Answer key is at end. Physics 202 Spring 2010 Practice Questions for Chapters 21-24 1. A uniformly positively charged spherical conductor is placed midway between two identical uncharged conducting

### Chapter 17 Electric Potential

Chapter 17 Electric Potential 1. Doubling both charges changes the potential energy for a pair of point charges by a factor of: A. 2. B. 4. C. ½. D. ¼. E. 1 (no change). 4. What is the distance between

### Physics 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

### Fall 12 PHY 122 Homework Solutions #4

Fall 12 PHY 122 Homework Solutions #4 Chapter 23 Problem 45 Calculate the electric potential due to a tiny dipole whose dipole moment is 4.8 x 10-30 C.m at a point 4.1 x 10-9 m away if this point is (a)

### Exam 1 Solutions. PHY2054 Fall 2014. Prof. Paul Avery Prof. Andrey Korytov Sep. 26, 2014

Exam 1 Solutions Prof. Paul Avery Prof. Andrey Korytov Sep. 26, 2014 1. Charges are arranged on an equilateral triangle of side 5 cm as shown in the diagram. Given that q 1 = 5 µc and q 2 = q 3 = 2 µc

### Physics 30 Worksheet #10 : Magnetism From Electricity

Physics 30 Worksheet #10 : Magnetism From Electricity 1. Draw the magnetic field surrounding the wire showing electron current below. x 2. Draw the magnetic field surrounding the wire showing electron

### Electric Potential Energy. Voltage and Capacitance. Electric Work. Electric Potential: Voltage 6/1/2016

Electric Potential Energy Voltage and Capacitance Chapter 17 Potential Energy of a charge Wants to move when it has high PE Point b U = max K = min Point a U = min K = max Electric Work Charge moving between

### 1. Two charges +Q and -3Q are placed in opposite corners of a square. The work required to move a test charge q from point A to point B is:

Electric Potential & Capacitance Multiple Choice 1. Two charges +Q and -3Q are placed in opposite corners of a square. The work required to move a test charge q from point A to point B is: (A) dependent

### AP2 Electrostatics. Three point charges are located at the corners of a right triangle as shown, where q 1. are each 1 cm from q 3.

Three point charges are located at the corners of a right triangle as shown, where q 1 = q 2 = 3 µc and q 3 = -4 µc. If q 1 and q 2 are each 1 cm from q 3, what is the magnitude of the net force on q 3?

### 13. In the circuit shown the amount of charge on the plates of capacitor is 5 V

CAPACITORS 1. A parallel plate air capacitor consists of two circular plates of 2m 2 area separated by 1mm. If the gap between plates is doubled then its capacitance will be 1. Halved 2. Doubled 3. 4 times

### CHAPTER 26 ELECTROSTATIC ENERGY AND CAPACITORS

CHAPTER 6 ELECTROSTATIC ENERGY AND CAPACITORS. Three point charges, each of +q, are moved from infinity to the vertices of an equilateral triangle of side l. How much work is required? The sentence preceding

### Chapter 16 Electric Forces and Fields

Chapter 16 Electric Forces and Fields 2. How many electrons does it take to make one coulomb of negative charge? A. 1.00 10 9 B. 6.25 10 18 C. 6.02 10 23 D. 1.66 10 18 E. 2.24 10 4 10. Two equal point

### AP Physics Whiteboards Capacitance

AP Physics Whiteboards Capacitance 1. The potential difference between the two metal plates in the illustration to the right is 40 V. a. Which plate is at the higher potential? b. How much work must be

### AP Physics Capacitance Mr. McMullen

1) A region of space contains a uniform electric field, directed toward the right, as shown in the figure. Which statement about this situation is correct? A) The potential at all three locations is the

### HW7 Solutions Notice numbers may change randomly in your assignments and you may have to recalculate solutions for your specific case.

HW7 Solutions Notice numbers may change randomly in your assignments and you may have to recalculate solutions for your specific case. Tipler 24.P.021 (a) Find the energy stored in a 20.00 nf capacitor

### Conceptual Questions Two charged objects are separated by a distance d. The first charge is larger in magnitude than the second charge.

Conceptual Questions 16 1. Two charged objects are separated by a distance d. The first charge is larger in magnitude than the second charge. A) The first charge exerts a larger force on the second charge.

### Magnetism. d. gives the direction of the force on a charge moving in a magnetic field. b. results in negative charges moving. clockwise.

Magnetism 1. An electron which moves with a speed of 3.0 10 4 m/s parallel to a uniform magnetic field of 0.40 T experiences a force of what magnitude? (e = 1.6 10 19 C) a. 4.8 10 14 N c. 2.2 10 24 N b.

### 4. The units of the electric field are: A. N C 2 B. C/N C. N D. N/C E. C/m 2 ans: D

Chapter 22: ELECTRIC FIELDS 1 An electric field is most directly related to: A the momentum of a test charge B the kinetic energy of a test charge C the potential energy of a test charge D the force acting

Last Name: First Name: Physics 102 Spring 2006: Exam #2 Multiple-Choice Questions 1. A charged particle, q, is moving with speed v perpendicular to a uniform magnetic field. A second identical charged

### 3. A capacitor C has a charge Q. The actual charges on its plates are: A. Q, Q B. Q/2, Q/2 C. Q, Q D. Q/2, Q/2 E. Q, 0 ans: C

Chapter 25: CAPACITANCE 1. The units of capacitance are equivalent to: A. J/C B. V/C C. J 2 /C D. C/J E. C 2 /J 2. A farad is the same as a: A. J/V B. V/J C. C/V D. V/C E. N/C 3. A capacitor C has a charge

### Chapter 24 Capacitance, Dielectrics, Electric Energy Storage. Copyright 2009 Pearson Education, Inc.

Chapter 24 Capacitance, Dielectrics, Electric Energy Storage Units of Chapter 24 Capacitors Determination of Capacitance Capacitors in Series and Parallel Electric Energy Storage Dielectrics Molecular

### 2014/2 ENGINEERING DEPARTMENTS PHYSICS 2 RECITATION 4 (CAPACITANCE AND DIELECTRICS/ CURRENT&RESISTANCE and DIRECT CURRENT CIRCUITS)

2014/2 ENGINEERING DEPARTMENTS PHYSICS 2 RECITATION 4 (CAPACITANCE AND DIELECTRICS/ CURRENT&RESISTANCE and DIRECT CURRENT CIRCUITS) 1. An air filled capacitor consists of two parallel plates, each with

### MULTIPLE 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.

### Electromagnetism Extra Study Questions Short Answer

Electromagnetism Extra Study Questions Short Answer 1. The electrostatic force between two small charged objects is 5.0 10 5 N. What effect would each of the following changes have on the magnitude of

### NAME. and 2I o. (1) Two long wires carry magnetic fields I o. , where I o

(1) Two long wires carry magnetic fields I o and 2I o, where I o is a constant. The two wires cross at the origin (but without making any electrical connection), and lie in the x-y plane. (a) Find the

### Electrical Energy, Potential and Capacitance. AP Physics B

Electrical Energy, Potential and Capacitance AP Physics B Electric Fields and WORK In order to bring two like charges near each other work must be done. In order to separate two opposite charges, work

### HW6 Solutions Notice numbers may change randomly in your assignments and you may have to recalculate solutions for your specific case.

HW6 Solutions Notice numbers may change randomly in your assignments and you may have to recalculate solutions for your specific case. Tipler 22.P.053 The figure below shows a portion of an infinitely

### Fall 12 PHY 122 Homework Solutions #8

Fall 12 PHY 122 Homework Solutions #8 Chapter 27 Problem 22 An electron moves with velocity v= (7.0i - 6.0j)10 4 m/s in a magnetic field B= (-0.80i + 0.60j)T. Determine the magnitude and direction of the

### physics 111N electric potential and capacitance

physics 111N electric potential and capacitance electric potential energy consider a uniform electric field (e.g. from parallel plates) note the analogy to gravitational force near the surface of the Earth

### 2. A 200-N/C electric field is in the positive x direction. The force on an electron in this field is:

University Physics (Prof. David Flory) Chapt_23 Sunday, February 03, 2008 Page 1 Name: Date: 1. The dipole moment of an electric dipole in a 300-N/C electric field is initially perpendicular to the field,

### Physics 122 (Sonnenfeld), Spring 2013 ( MPSONNENFELDS2013 ) My Courses Course Settings

Signed in as Richard Sonnenfeld, Instructor Help Sign Out Physics 122 (Sonnenfeld), Spring 2013 ( MPSONNENFELDS2013 ) My Courses Course Settings Course Home Assignments Roster Gradebook Item Library Essential

Dr. Iyad SAADEDDIN Chapter 5: Capacitance 5-: What is physics Capacitance, C, is the ability of a body to store an electrical l charge Any object that t can be electrically ll charged exhibits capacitance

### 3. As shown in the diagram below, a charged rod is held near, but not touching, a neutral electroscope.

1. As a positively charged rod is brought near to but not allowed to touch the knob of an uncharged electroscope, the leaves will diverge because negative charges are transferred from the electroscope

### Clicker Question. Two small objects each with a net charge of +Q exert a force of magnitude F on each other. F +Q

A hollow metal sphere is electrically neutral (no excess charge). A small amount of negative charge is suddenly placed at one point P on this metal sphere. If we check on this excess negative charge a

### A satellite of mass 5.00x10² kg is in a circular orbit of radius 2r around Earth. Then it is moved to a circular orbit radius of 3r.

Supplemental Questions A satellite of mass 5.00x10² kg is in a circular orbit of radius 2r around Earth. Then it is moved to a circular orbit radius of 3r. (a) Determine the satellite s GPE in orbit. (b)

### 4/16/ Bertrand

Physics B AP Review: Electricity and Magnetism Name: Charge (Q or q, unit: Coulomb) Comes in + and The proton has a charge of e. The electron has a charge of e. e = 1.602 10-19 Coulombs. Charge distribution

### Chapter 19 Magnetic Forces and Fields

Chapter 19 Magnetic Forces and Fields Student: 3. The magnetism of the Earth acts approximately as if it originates from a huge bar magnet within the Earth. Which of the following statements are true?

### Chapter 17: Electric Potential

hapter 17: Electric Potential Electric Potential Energy Electric Potential How are the E-field and Electric Potential related? Motion of Point harges in an E-field apacitors Dielectrics 1 Electric Potential

### 6/3/2013. Ch 30: Voltage and the Electric Field. DV = -EDs. [Work done BY the force] DV = DU q. E = electric field strength Ds = change in distance

Ch 30: Voltage and the Electric Field DU = -W c (i f) DV = DU q DV = -FDs q DV = -EqDs /q [Work done BY the force] DU = -FDs F = Eq DV = -EDs E = electric field strength Ds = change in distance (negative

### Electrostatics-E Field

1. Which diagram represents the electric field lines between two small electrically charged spheres? 2. Which graph best represents the relationship between the magnitude of the electric field strength,

Last Name: First Name: Physics 102 Spring 2007: Exam #1 Multiple-Choice Questions 1. Two small conducting spheres attract one another electrostatically. This can occur for a variety of reasons. Which of

### Candidate Number. General Certificate of Education Advanced Level Examination June 2010

entre Number andidate Number Surname Other Names andidate Signature General ertificate of Education dvanced Level Examination June 1 Physics PHY4/1 Unit 4 Fields and Further Mechanics Section Friday 18

### Solution Derivations for Capa #5

Solution Derivations for Capa #5 1) A positive charge of Q = 5.30 µc is fixed in place. From a distance of r i = 4.40 cm a particle of mass m = 6.00 g and charge q = +3.70 µc is fired with an initial speed

### 2. In Newton s universal law of gravitation the masses are assumed to be. B. masses of planets. D. spherical masses.

Practice Test: 41 marks (55 minutes) Additional Problem: 19 marks (7 minutes) 1. A spherical planet of uniform density has three times the mass of the Earth and twice the average radius. The magnitude

### Phys222 Winter 2012 Quiz 4 Chapters 29-31. Name

Name If you think that no correct answer is provided, give your answer, state your reasoning briefly; append additional sheet of paper if necessary. 1. A particle (q = 5.0 nc, m = 3.0 µg) moves in a region

### Chapter 26 Capacitance and

hapter 6 apacitance and Dielectrics We must do work, q, to bring a point charge q from far away ( at infinity) to a region where other charges are present. The work done is stored in electrostatic field

### The Electric Force. From mechanics, the relationship for the gravitational force on an object is: m is the mass of the particle of interest,

. The Electric Force Concepts and Principles The Gravitational Analogy In introducing the concept of the electric field, I tried to illustrate it by drawing an analogy with the gravitational field, g.

### 1 of 7 3/23/2010 2:45 PM

1 of 7 3/23/2010 2:45 PM Chapter 30 Homework Due: 8:00am on Tuesday, March 23, 2010 Note: To understand how points are awarded, read your instructor's Grading Policy. [Return to Standard Assignment View]

### Potential and voltage. Electric forces exert on any charge placed in the electric field

Potential and voltage q F Electric forces exert on any charge placed in the electric field The electric field E has the magnitude and the direction (it is a vector) The direction of the field is taken

### Electrostatics. Ans.The particles 1 and 2 are negatively charged and particle 3 is positively charged.

Electrostatics [ Two marks each] Q1.An electric dipole with dipole moment 4 10 9 C m is aligned at 30 with the direction of a uniform electric field of magnitude 5 10 4 N C 1. Calculate the net force and

### 1. A 20-F capacitor is charged to 200 V. Its stored energy is:

University Physics (Prof. David Flory) Chapt_28 Sunday, February 03, 2008 Page 1 Name: Date: 1. A 20-F capacitor is charged to 200 V. Its stored energy is: A) 4000 J B) 4 J C) 0.4 J D) 2000 J E) 0.1 J

### Magnetism Conceptual Questions. Name: Class: Date:

Name: Class: Date: Magnetism 22.1 Conceptual Questions 1) A proton, moving north, enters a magnetic field. Because of this field, the proton curves downward. We may conclude that the magnetic field must

### 2015 Pearson Education, Inc. Section 24.5 Magnetic Fields Exert Forces on Moving Charges

Section 24.5 Magnetic Fields Exert Forces on Moving Charges Magnetic Fields Sources of Magnetic Fields You already know that a moving charge is the creator of a magnetic field. Effects of Magnetic Fields

### Chapter 18 Electric Forces and Electric Fields. Key Concepts:

Chapter 18 Lectures Monday, January 25, 2010 7:33 AM Chapter 18 Electric Forces and Electric Fields Key Concepts: electric charge principle of conservation of charge charge polarization, both permanent

### Objectives for the standardized exam

III. ELECTRICITY AND MAGNETISM A. Electrostatics 1. Charge and Coulomb s Law a) Students should understand the concept of electric charge, so they can: (1) Describe the types of charge and the attraction

### Concept Review. Physics 1

Concept Review Physics 1 Speed and Velocity Speed is a measure of how much distance is covered divided by the time it takes. Sometimes it is referred to as the rate of motion. Common units for speed or

### Physics 112 Homework 5 (solutions) (2004 Fall) Solutions to Homework Questions 5

Solutions to Homework Questions 5 Chapt19, Problem-2: (a) Find the direction of the force on a proton (a positively charged particle) moving through the magnetic fields in Figure P19.2, as shown. (b) Repeat

### Homework #8 203-1-1721 Physics 2 for Students of Mechanical Engineering. Part A

Homework #8 203-1-1721 Physics 2 for Students of Mechanical Engineering Part A 1. Four particles follow the paths shown in Fig. 32-33 below as they pass through the magnetic field there. What can one conclude

### A2 Physics - Electric Fields Q&A Revision Sheet

Give the equation relating to the force between point charges in a vacuum If 'F' (the force) is negative what does that mean? If 'F' (the force) is positive what does that mean? State Coulomb's Law F is

### Lesson 12: Magnetic Forces and Circular Motion!

Lesson 12: Magnetic Forces and Circular Motion If a magnet is placed in a magnetic field, it will experience a force. Types of magnets: Direction of the force on a permanent magnet: Direction of the force

### Exam No. 1 Solutions

Exam No. 1 Solutions I. (20 pts) Three positive charges q 1 = +2 μc, q 2 = +1 μc, and q 3 = +1 μc are arranged at the corners of an equilateral triangle of side 2 m as shown in the diagram. Calculate:

### HMWK 3. Ch 23: P 17, 23, 26, 34, 52, 58, 59, 62, 64, 73 Ch 24: Q 17, 34; P 5, 17, 34, 42, 51, 52, 53, 57. Chapter 23

HMWK 3 Ch 23: P 7, 23, 26, 34, 52, 58, 59, 62, 64, 73 Ch 24: Q 7, 34; P 5, 7, 34, 42, 5, 52, 53, 57 Chapter 23 P23.7. Prepare: The connecting wires are ideal with zero resistance. We have to reduce the

### Chapter 26. Capacitance and Dielectrics

Chapter 26 Capacitance and Dielectrics Capacitors Capacitors are devices that store electric charge Examples where capacitors are used: radio receivers filters in power supplies energy-storing devices

### PHYS-2020: General Physics II Course Lecture Notes Section II

PHYS-2020: General Physics II Course Lecture Notes Section II Dr. Donald G. Luttermoser East Tennessee State University Edition 4.0 Abstract These class notes are designed for use of the instructor and

### Multiple Choice Questions for Physics 1 BA113 Chapter 23 Electric Fields

Multiple Choice Questions for Physics 1 BA113 Chapter 23 Electric Fields 63 When a positive charge q is placed in the field created by two other charges Q 1 and Q 2, each a distance r away from q, the

### Coefficient of Potential and Capacitance

Coefficient of Potential and Capacitance Lecture 12: Electromagnetic Theory Professor D. K. Ghosh, Physics Department, I.I.T., Bombay We know that inside a conductor there is no electric field and that

### Version 001 Electrostatics II tubman (12125) 1. second particle of charge 13 µc. Determine the magnitude of the initial acceleration

Version 001 Electrostatics II tubman (12125) 1 This print-out should have 15 questions. Multiple-choice questions ma continue on the net column or page find all choices before answering. Negativel Charged

### If two identical balls each of mass m and having charge q are suspended by silk thread of length l from the same point o,then the distance between

If two identical balls each of mass m and having charge q are suspended by silk thread of length l from the same point o,then the distance between the balls is given by : = X = 2 ( ) 1 Two pith balls each

### Module 2 : Electrostatics Lecture 12 : Conductors and Dielectric

Module 2 : Electrostatics Lecture 12 : Conductors and Dielectric Objectives In this lecture you will learn the following Properties of capacitors fielled with dielectric Force on a dielectric Calculation

### ACME STUDY POINT. is added in parallel. Are (a) the potential difference across C 1. and (b) the charge q 1. of C 1

QUESTION FOR SHORT ANSWER Q.1 The electric strength of air is about 30, 000 V/cm. By this we mean that when the electric field intensity exceeds this value, a spark will jump through the air. We say that

### Physics 121 Sample Common Exam 3 NOTE: ANSWERS ARE ON PAGE 6. Instructions: 1. In the formula F = qvxb:

Physics 121 Sample Common Exam 3 NOTE: ANSWERS ARE ON PAGE 6 Signature Name (Print): 4 Digit ID: Section: Instructions: Answer all questions 24 multiple choice questions. You may need to do some calculation.

### Physics 133: tutorial week 3,4 Capacitance, resistivity and resistance

Physics 33: tutorial week 3,4 Capacitance, resistivity and resistance 20. How much charge flows from a 2.0V battery when it is connected to a 2.0 ñf capacitor? (24 ñc) q CV 2.0 0 6 2 2.4 0 5 C. 2. The

### SPH4U UNIVERSITY PHYSICS

SPH4U UNIVERSITY PHYSICS GRAVITATIONAL, ELECTRIC, &... FIELDS L Magnetic Force on Moving Charges (P.386-391) Particle Accelerators As was stated earlier, the ability to accelerate charged particles with

### ( )( 10!12 ( 0.01) 2 2 = 624 ( ) Exam 1 Solutions. Phy 2049 Fall 2011

Phy 49 Fall 11 Solutions 1. Three charges form an equilateral triangle of side length d = 1 cm. The top charge is q = - 4 μc, while the bottom two are q1 = q = +1 μc. What is the magnitude of the net force

### Calculate the centripetal acceleration of the boot just before impact

(ii) alculate the centripetal acceleration of the boot just before impact....... (iii) iscuss briefly the radial force on the knee joint before impact and during the impact................. (4) (Total

### 104 Practice Exam 2-3/21/02

104 Practice Exam 2-3/21/02 1. Two electrons are located in a region of space where the magnetic field is zero. Electron A is at rest; and electron B is moving westward with a constant velocity. A non-zero

### LECTURE 19 CAPACITORS. Instructor: Kazumi Tolich

LECTURE 19 CAPACITORS Instructor: Kazumi Tolich Lecture 19 2! Reading chapter 20-5 to 20-6.! Capacitance! Parallel-plate capacitor! The storage of electrical energy! Dielectrics Capacitors 3!!!!! A capacitor

### Lesson 6 Capacitors and Capacitance Lawrence B. Rees 2007. You may make a single copy of this document for personal use without written permission.

Lesson 6 apacitors and apacitance Lawrence B. Rees 7. You may make a single copy of this document for personal use without written permission. 6. Introduction In 745 Pieter van Musschenbroek, while trying

### UNIVERSITY OF SASKATCHEWAN Department of Physics and Engineering Physics

UNIVERSITY OF SASKATCHEWAN Department of Physics and Engineering Physics Physics 111.6 MIDTERM TEST #4 March 15, 2007 Time: 90 minutes NAME: (Last) Please Print (Given) STUDENT NO.: LECTURE SECTION (please

### Sample Exam #3 Electricity Physics 103 Spring 2011

Sample Exam #3 Electricity Physics 103 Spring 2011 1. An electric heater is constructed by applying a potential difference of 110 V across a wire with a resistance of 5.0 Ω. What is the power rating of

### Physics 126 Practice Exam #3 Professor Siegel

Physics 126 Practice Exam #3 Professor Siegel Name: Lab Day: 1. Which one of the following statements concerning the magnetic force on a charged particle in a magnetic field is true? A) The magnetic force

### ** Can skip to Problems: 6, 7, 9, 15, 19, 28, 29, 35, 36, 39, 42 **

Walker, Physics, 3 rd Edition Chapter 22 ** Can skip to Problems: 6, 7, 9, 15, 19, 28, 29, 35, 36, 39, 42 ** Conceptual Questions (Answers to odd-numbered Conceptual Questions can be found in the back

### 2. B The magnetic properties of a material depend on its. A) shape B) atomic structure C) position D) magnetic poles

ame: Magnetic Properties 1. B What happens if you break a magnet in half? A) One half will have a north pole only and one half will have a south pole only. B) Each half will be a new magnet, with both

### Phys 102 Spg Exam No. 2 Solutions

Phys 102 Spg. 2008 Exam No. 2 Solutions I. (20 pts) A 10-turn wire loop measuring 8.0 cm by 16.0 cm carrying a current of 2.0 A lies in the horizontal plane and is free to rotate about a horizontal axis

### Chapter 26A - Capacitance. A PowerPoint Presentation by Paul E. Tippens, Professor of Physics Southern Polytechnic State University

Chapter 6A - Capacitance A PowerPoint Presentation by Paul E. Tippens, Professor of Physics Southern Polytechnic State University 007 Objectives: After completing this module, you should be able to: Define

### Consider a plate of finite width carrying an excess positive charge. In isolation, the charge will migrate to both surfaces.

3 Conductors 3.1 Electric field and electric potential in the cavity of a conductor Conductors (eg metals) are materials in which charges move freely, whereas insulators (eg glass, rubber, wood) are materials

### ELECTRIC FIELD AND ELECTRIC POTENTIAL

PHYSICS 120 : ELECTRICITY AND MAGNETISM TUTORIAL QUESTIONS ELECTRIC FIELD AND ELECTRIC POTENTIAL Question 10 Consider a point 2.00m away from a -3.00 ñc point charge. Calculate (a) the electric field E

### Chapter 21: Electric Charge and Electric Field

Chapter 21: Electric Charge and Electric Field The nature of electric charge Understanding conservation of electric charge. How objects become electrically charged. Coulomb s law to calculate the electric

### Chapter 22 Magnetism

22.6 Electric Current, Magnetic Fields, and Ampere s Law Chapter 22 Magnetism 22.1 The Magnetic Field 22.2 The Magnetic Force on Moving Charges 22.3 The Motion of Charged particles in a Magnetic Field

### PHYS 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

### Profs. A. Petkova, A. Rinzler, S. Hershfield. Exam 2 Solution

PHY2049 Fall 2009 Profs. A. Petkova, A. Rinzler, S. Hershfield Exam 2 Solution 1. Three capacitor networks labeled A, B & C are shown in the figure with the individual capacitor values labeled (all units

### 1. If each of the four resistors below has a resistance of 1 µω, what is the equivalent resistance of the combination?

1. If each of the four resistors below has a resistance of 1 µω, what is the equivalent resistance of the combination? V (a) 0.25 µω (b) 1 µω (c) 2 µω (d) 4 µω (e) none of these 2. Three identical lamps

### AP2 Magnetism. (c) Explain why the magnetic field does no work on the particle as it moves in its circular path.

A charged particle is projected from point P with velocity v at a right angle to a uniform magnetic field directed out of the plane of the page as shown. The particle moves along a circle of radius R.

### SPH4U Gravitational, Electrical and Magnetic Fields Lesson 1 Newtonian Gravitation Page 1 of 4

NEWTONIAN GRAVITATION Universal Law of Gravitation There is a gravitational force of attraction between any two objects. If the objects have masses m 1 and m 2 and their centres are separated by a distance

### Physics 9 Fall 2009 Homework 2 - Solutions

Physics 9 Fall 009 Homework - s 1. Chapter 7 - Exercise 5. An electric dipole is formed from ±1.0 nc charges spread.0 mm apart. The dipole is at the origin, oriented along the y axis. What is the electric

### Chapter 19. Electric Potential Energy and the Electric Potential

Chapter 19 Electric Potential Energy and the Electric Potential 19.5 Capacitors and Dielectrics A parallel plate capacitor consists of two metal plates, one carrying charge +q and the other carrying charge