# Electrostatics. 4πε 2) + Q / 2 4) 4 Q

Size: px
Start display at page:

Transcription

1 Two spheres A and B of radius a and b respectively are at the same potential The ratio of the surface charge density of A to B is: ) a / b ) b / a a / b b / a Two free protons are separated by a distance of 0 A If they are released, the kinetic energy of each proton when at infinite separation is: ) x 0 9 J ) 5 x 0-9 J 46 x 0-9 J 56 x 0 - J A charge q is placed at the centre of the line joining of two equal charges each The system of three charges will be in equilibrium if q is equal to: ) / / 4 ) + / 4 4 A uniform wire of length 5m is carrying a steady current The electric field inside it is 0 V/m The potential difference across the ends of the wire is ) volt ) 05 volt 0 volt 5 volt 5 The electric potential due to an electric dipole at an axial point distant r from the dipole is related to r as: ) r ) r - r r - 6 A charge q is divided into two parts q and (q q ) What is the ratio q / q so that the force between the two parts placed a given distance apart is maximum? ) : ) : : :4 7 The electric potential at the surface of an atomic nucleus (Z=50) of radius 9 0 x 0 5 m : ) 80 volt ) 8 x 0 6 volt 9 volt 9 x 0 5 volt 8 Two point charges placed at a certain distance r in air exert a force of F on each other Then the distance r at which these charges will experience the same force in a medium of dielectric constant K is: ) r ) r / K r / K r K 9 An oil drop carrying a charge of 4 electrons has a mass of x 0-7 kg It is falling freely in air with terminal speed The electric field required to make the drop move upwards with the same speed is ( g = 0 m s ) ) x 0 V m - ) x0 V m - x 0 V m - 8 x 0 V m - 0 Six charges + each are placed at the corners of the regular hexagon of side a The electric field at the centre of hexagon is ) Zero 6 ) 0 a 0 a 6 0 a An isolated metal sphere of radius r is given a total charge q The potential energy of the sphere is: ) q / 4 π ε ) q / 4 π ε 9 r q / 8 π ε q / 8 π ε Charges +q, -4q and +q are arranged at the corners of an equilateral triangle of side 0 5 m If q = µ C ; their mutual potential energy is: ) 04 J ) 05 J 06 J 08 J Point charges 4 q, - q, + q and - q are placed at the corners of a square of side a The potential at point 0 ( the point of inter section of diagonals ) is: ) Zero 0 q ) 0q 0 5q 4 A bullet of mass g is moving with a speed of 0 ms - If the bullet has a charge of µc, through what potential must it be accelerated, starting from rest to acquire the same speed? ) 5 k V ) 5 V 50 V 50 k V 0

2 5 A hollow sphere of copper is having a uniform charge density of 05µC/m Its radius is 0m The potential at the centre of the sphere is: ) Zero ) 800 π volt 80 π volt 45 k V 6 An electron moving along positive x-axis with a speed of x 0 6 ms - enters the region of a uniform electric field The electron stops after traveling a distance of 90mm in the field The electric field strength is: (charge on electron = 6 x 0 9 C mass of electron = 9 x 0 - kg) ) 84 k V m -, along ve x - axis ) 0 84 k V m -, along ve x - axis 0 84 k V m -, along + ve x -axis 8 4 k V m -, along + ve x -axis 7 ABC is an equilateral triangle of side m Charges of + µc and - µc respectively are placed at points B and C The electric field at A is: ) 9 x 0 NC - ) 8 x 0 NC - 9 x 0 NC - parallel to BC 9 x 0 NC - parallel to CB 8 Two metal plates having a potential difference of 800V are cm apart It is found that a particle of mass 96 x 0-5 kg remain suspended in the region between the plates The charge on the particle must be (e = elementary charge): ) e ) 4 e 6 e 8 e 9 Total electric flux coming out of a unit positive charge put in air is: ) ε 0 ) ε 0 - (4 π ε 0 ) - 4 π ε 0 0 An electric dipole of moment p is placed normal to the lines of force of electric field E, then the work done in deflecting it through an angle of 80 degrees is: ) p E ) + p E - p E Zero The ratio of momentum of an electron and an alpha particle which are accelerated from rest by a potential difference of 00V is: ) m ) e m α m α m e m e mα A region surrounding a stationary electric dipole has: ) Magnetic field only ) Electric field only Both electric and magnetic fields No electric and magnetic fields Two pith balls each of mass m and charge q are suspended from a point by weightless threads of length l Both the threads are separated by an angle θ with the vertical If the value of θ is negligible, the distance between two pith balls will be ) q l 0mg ql 4 0mg ) q l 4 0mg ql 0mg 4 The dielectric constant K of an insulator cannot be: ) 4 ) When the distance between two charged particles is halved, the coulomb force between them becomes: ) one-half ) one-fourth double four times 6 The minimum charge on an object is ) One coulomb ) One stat coulomb 6 x 0-0 coulomb 6 x 0-9 coulomb

3 7 Two charges q and q are placed in vacuum at a distance d, and the force acting between them is F If a medium of dielectric constant 4 is introduced around them, the force now will be: ) 4 F ) F F F 4 8 A solid metallic sphere has a charge + Concentric with this sphere is a conducting spherical shell having charge The radius of the sphere is a and that of the spherical shell is b (b>a) What is the electric field at a distance R (a < R < b) from the centre? ) ) πε 0 R πε 0 R 4 πε 0 R 4 πε 0 R 9 In a region of space having an uniform electric field E, a hemi-spherical bowl of radius r is placed The electric flux φ through the bowl is: ) πr E ) πr E πre 4πr E 0 A hollow spherical conductor of radius m carries a charge of 500µC Then the electric field strength at its surface is: ) Zero ) 5 x 0 6 N/C 5 x 0 6 N / C 4 5 x 0 6 N / C The electric field intensity on the surface of a charged conductor is: ) Zero ) Directed normally to the surface Directed tangentially to the surface Directed along 45º to the surface A proton is released from rest at a distance of 0-4 A 0 from the nucleus of a mercury atom (Z=80) The kinetic energy of the proton when it is far away from the nucleus is: ) e V ) k e V M e V M e V Two thin concentric hollow conducting spheres of radii R and R bears charges and respectively If R > R, then the potential at a point distant r such that: R > r > R is ) + ) 0 r 0 r R 0 R R 0 R r 4 Two thin concentric hollow conducting spheres of radii R and R bears charges and respectively If R > R, then the electric field strength at a point distant r such that R > r > R is: ) Zero ) + 5 Two small spheres carry charge of + n C and n C respectively The charges are distance d apart The force they exert on one another is F The spheres are made to touch one another and then separated to distance d apart The force they exert on one another now is F Then F / F is: ) ) / 6 : 9 6 A cylinder of radius R and length L is placed in the region of a uniform electric field E such that its axis is along the direction of electric field The electric flux linked with cylinder is: ) R/L ) R /L Zero Infinity 7 Two metallic spheres of radii cm and cm are given charges 0 - C and 5x0 - C respectively If they are connected by a conducting wire, the final charge on the smaller sphere is: ) x 0 - C ) x 0 - C 4 x 0 - C x 0 - C

4 4 8 If the dielectric constant and dielectric strength be denoted by K and X respectively, then a material suitable for use as a dielectric in a capacitor must have ) high K and high X ) high K and low X low K and high X low K and low X 9 An electric dipole consists of two opposite charges each of magnitude 6x0-9 coulomb at separation 0 A The dipole moment is: ) 6 x 0-9 coul-metre ) 6 x 0-9 coul-metre x 0-9 coul-metre 0 8 x 0-9 coul-metre 40 A is a spherical conductor placed concentrically inside a hollow spherical conductor B + charge is given to A and B is earthed The electric intensity is not zero ) inside A ) outside B on the surface of B between A and B 4 Electron and proton are accelerated from rest by a potential of V volt Mass of proton is 840 times the mass of electron v e, K e and K p, stand for the speed and kinetic energy of electron and proton respectively Then: ) v e = v p ; K e = K p ) v e < v p ; K e < K p v e < v p ; K e > K p v e > v p ; K e = K p 4 The work done in carrying a charge of 5 µc from a point A to B is 8mJ The difference of potential between A and B is: ) 60 V ) 6 V 6 k V 6 k V 4 Compare electrons accelerated through a certain potential difference and protons accelerated through the same pd If initial velocities are negligible, then the emergent; ) electrons have smaller kinetic energy ) protons have larger velocity electrons have larger momentum protons have larger momentum 44 The fact that electric charges are integral multiples of the fundamental electronic charge was proved experimentally by: ) Planck ) JJ Thomson Einstein Millikan 45 An electron enters with a velocity of 5x0 6 m/sec along the positive direction of an electric field of intensity 0 newton per coulomb If mass of electron is 9 x 0 - kg, then the time taken by the electron to come temporarily to rest, is: ) 5 8 x 0-8 sec ) 45 x 0-8 sec 9 x 0-8 sec 46 There are 7 drops of a conducting fluid Each has a radius a and they are charged to a potential V 0 These are combined to form a bigger drop Its potential will be: ) V 0 ) V 0 9 V 0 7 V 0 47 A particle having a charge 0x0-9 coulomb experiences a downward force of 5x0-6 newton when placed in a field of electric intensity (in Newton per coulomb), is: ) 5 x 0 horizontally ) 5 x 0 vertically downward 5 x 0 vertically upward 5 x 0-5 vertically upward 48 Charges of + ( 0 / ) x 0 9 C are placed at each of the four corners of a square of side 8 cm The potential at the intersection of the diagonals is: ) 50 volt ) 500 volt 900 volt d) 900 volt 49 An electron placed at a distance of 05m from a charge placed at origin, experiences a force of 9 6 x 0-6 N along positive x - axis The electric field at the position of electron is: ) 6 x 0 NC - along + ve x - axis ) 6 x 0 NC - along ve x - axis 5 6 x 0-4 NC - along + ve x - axis 5 6 x 0-4 NC - along ve x - axis

5 5 50 A rectangle of cross-sectional area A is placed in a uniform electric field The normal to the area of the coil makes an angle of 90º with the electric field The electric flux, φ, through the rectangle is: ) E ) A E A E / Zero 5 The number of electric lines of force crossing the surface of an arbitrary curve of surface area S and enclosing a charge q is: ) 0 ) q 0 S q / 0 q V / 0 Where q is the charge inside the closed surface 5 Equal charges q are placed at the four corners A, B, C, D of a square of length a The magnitude of the force on the charge at D will be: q 4q ) ) 0a 0a + q q + 0a 0a 5 Two charges are 40µC and -0µC They are some distance apart Now they are touched and kept at the same distance The ratio of the initial to the final force between them is: ) 8 : ) 4 : : 8 : 54 Charges of µc and -µc are placed respectively at two points A and B distant m The distance of the point from A, where net potential is zero, is: ) m ) 0 5 m 0 4 m 0 6 m 55 Charges q and q are placed respectively at points A and B The net force on a unit positive charge placed at a distance of: 56 Electric potential V at some point in space is zero This means: ) Electric field at that point is necessarily zero ) Electric field at that point is necessarily non-zero Electric field at that point may or may not be non-zero The point is on the surface 57 Equal charges q are placed at the three corners A, B & C of a square ABCD of side a The potential at A is: ) q q ) 0 a 0 a q q + πε [ + 4 0a 0a ] 58 Equal charges q are placed at the three corners A, B & C of a square ABCD of side a The ratio of potential at A and O (the point of intersection of diagonals) is: ) ) An electric dipole consists of two opposite charges each of magnitude 0 µ C separated by a distance of 0 cm The dipole is placed in an external field of 0 x 0 5 N / C The maximum torque on the dipole is: )0 x 0 - N- m ) 0 x 0 - N-m 0 x 0 - N- m 4 0 x 0 - N-m 60 Charges +q, -q, +q and q are placed at the corners A, B, C & D of a square ABCD of side a The charge A is in equilibrium The ratio q /q is: ) ) / ) 0 6 m ) (- + ) / m ( - - ) / m 05 m from A is zero

### PHYSICS. Electrostatics

Electrostatics Coulomb s Law: SYNOPSIS SI unit of electric intensity is NC -1 Dimensions The electric intensity due to isolated point charge, Electric dipole moment, P = q (2a), SI unit is C m Torque on

### 7. A capacitor has been charged by a D C source. What are the magnitude of conduction and displacement current, when it is fully charged?

1. In which Orientation, a dipole placed in uniform electric field is in (a) stable (b) unstable equilibrium. 2. Two point charges having equal charges separated by 1 m in distance experience a force of

Question 1.1: What is the force between two small charged spheres having charges of 2 10 7 C and 3 10 7 C placed 30 cm apart in air? Repulsive force of magnitude 6 10 3 N Charge on the first sphere, q

### 1)Tw o charges g 4q q and q q are placed

Electrostatics 1)Two charges 4q and q are placed a distance r apart. A charge Q is placed exactly mid way between them. What will be the value of Q so that charge 4q experiences no net force? q/4 q/4 q4

### Class XII Chapter 1 Electric Charges And Fields Physics

Class XII Chapter 1 Electric Charges And Fields Physics Question 1.1: What is the force between two small charged spheres having charges of 2 10 7 C and 3 10 7 C placed 30 cm apart in air? Answer: Repulsive

### ELECTROSTATICS (Important formulae and Concepts) I Electric charges and Coulomb s law

ELECTROSTATICS (Important formulae and Concepts) I Electric charges and Coulomb s law II Electric Field and Electric Dipole www.nrpschool.com www.nrpschool.com III ELECTRIC POTENTIAL www.nrpschool.com

### 2014 F 2014 AI. 1. Why must electrostatic field at the surface of a charged conductor be normal to the surface at every point? Give reason.

2014 F 1. Why must electrostatic field at the surface of a charged conductor be normal to the surface at every point? Give reason. 2. Figure shows the field lines on a positive charge. Is the work done

CLASS XII Write Short Note: Q.1: Q.2: Q.3: SELAQUI INTERNATIONAL SCHOOL, DEHRADUN ELECTROSTATICS SUBJECT: PHYSICS (a) A truck carrying explosive has a metal chain touching the ground. Why? (b) Electric

### Roll Number SET NO. 42/1

Roll Number SET NO. 4/1 INDIAN SCHOOL MUSCAT FIRST TERM EXAMINATION PHYSICS CLASS: XII Sub. Code: 04 Time Allotted: Hrs 0.04.018 Max. Marks: 70 General Instructions: 1. All questions are compulsory. There

### Supplemental Questions 12U

Supplemental Questions 12U Gravitational, Electric and Magnetic Fields 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

### Physics (

Question 2.12: A charge of 8 mc is located at the origin. Calculate the work done in taking a small charge of 2 10 9 C from a point P (0, 0, 3 cm) to a point Q (0, 4 cm, 0), via a point R (0, 6 cm, 9 cm).

### 13 - ELECTROSTATICS Page 1 ( Answers at the end of all questions )

3 - ELECTROSTATICS Page ) Two point charges 8 and - are located at x = 0 and x = L respectively. The location of a point on the x axis at which the net electric field due to these two point charges is

### P Q 2 = -3.0 x 10-6 C

1. Which one of the following represents correct units for electric field strength? A. T B. N/C C. J / C D. N m 2 /C 2 2. The diagram below shows two positive charges of magnitude Q and 2Q. P Q 2Q Which

### 2. E A 3. E A 4. E A 5. E A

west (mrw3223) HW 23 lyle (16001) 1 This print-out should have 32 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. Reading assignment: Hecht

### P202 Practice Exam 1 Spring 2004 Instructor: Prof. Sinova

P202 Practice Exam 1 Spring 2004 Instructor: Prof. Sinova Name: Date: 1. Each of three objects has a net charge. Objects A and B attract one another. Objects B and C also attract one another, but objects

### PHYS102 Previous Exam Problems. Electric Fields

PHYS102 Previous Exam Problems CHAPTER 22 Electric Fields Electric field Point charge in an electric field Electric dipole 1. Two identical charges, each of charge Q, are positioned at points A (5.0 m,

### INDIAN SCHOOL MUSCAT FIRST TERM EXAMINATION PHYSICS

Roll Number SET NO. General Instructions: INDIAN SCHOOL MUSCAT FIRST TERM EXAMINATION PHYSICS CLASS: XII Sub. Code: 04 Time Allotted: Hrs 0.04.08 Max. Marks: 70. All questions are compulsory. There are

### MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the 1) A small sphere with a mass of 441 g is moving upward along the vertical +y-axis when it encounters

### Where, ε 0 = Permittivity of free space and = Nm 2 C 2 Therefore, force

Exercises Question.: What is the force between two small charged spheres having charges of 2 0 7 C and 3 0 7 C placed 30 cm apart in air? Answer.: Repulsive force of magnitude 6 0 3 N Charge on the first

### A) 1, 2, 3, 4 B) 4, 3, 2, 1 C) 2, 3, 1, 4 D) 2, 4, 1, 3 E) 3, 2, 4, 1. Page 2

1. Two parallel-plate capacitors with different plate separation but the same capacitance are connected in series to a battery. Both capacitors are filled with air. The quantity that is NOT the same for

### Physics 212 Exam I Sample Question Bank 2008 Multiple Choice: choose the best answer "none of the above" may can be a valid answer

Multiple Choice: choose the best answer "none of the above" may can be a valid answer The (attempted) demonstration in class with the pith balls and a variety of materials indicated that () there are two

### Chapter 1 The Electric Force

Chapter 1 The Electric Force 1. Properties of the Electric Charges 1- There are two kinds of the electric charges in the nature, which are positive and negative charges. - The charges of opposite sign

### Gurgaon TOPIC: ELECTROSTATIC Assignment 1 (2018)

LJPS Class XII Gurgaon TOPIC: ELECTROSTATIC Assignment (08). A uniform electric field E exists between two charged plates as shown in figure. What would be the work done in moving a charge q along the

### 1. Four equal and positive charges +q are arranged as shown on figure 1.

AP Physics C Coulomb s Law Free Response Problems 1. Four equal and positive charges +q are arranged as shown on figure 1. a. Calculate the net electric field at the center of square. b. Calculate the

### A 12-V battery does 1200 J of work transferring charge. How much charge is transferred? A source of 1.0 µc is meters is from a positive test

1 A source of 1.0 µc is 0.030 meters is from a positive test charge of 2.0 µc. (a) What is the force on the test charge? (b) What is the potential energy of the test charge? (c) What is the strength of

### Cutnell/Johnson Physics

Cutnell/Johnson Physics Classroom Response System Questions Chapter 18 Electric Forces and Electric Fields Interactive Lecture Questions 18.1.1. A brass key has a net positive charge of +1.92 10 16 C.

### (a) What is the magnitude of the electric force between the proton and the electron?

.3 Solved Problems.3. Hydrogen Atom In the classical model of the hydrogen atom, the electron revolves around the proton with a radius of r = 053. 0 0 m. The magnitude of the charge of the electron and

### AP physics B web review ch 15 electric forces and fields

Name: Class: _ Date: _ AP physics B web review ch 15 electric forces and fields Please do not write on my tests Multiple Choice Identify the choice that best completes the statement or answers the question.

### 1. The diagram shows the electric field lines produced by an electrostatic focussing device.

1. The diagram shows the electric field lines produced by an electrostatic focussing device. Which one of the following diagrams best shows the corresponding equipotential lines? The electric field lines

### PHYS102 Previous Exam Problems. Electric Potential

PHYS102 Previous Exam Problems CHAPTER 24 Electric Potential Electric potential energy of a point charge Calculating electric potential from electric field Electric potential of point charges Calculating

### PHYSICS 30 ELECTRIC FIELDS ASSIGNMENT 1 55 MARKS

For each of the following questions complete communication must be shown. Communication consists of an introduction to the physics of the situation, diagrams, word explanations and calculations in a well

### Electrostatics. 3) positive object: lack of electrons negative object: excess of electrons. Particle Mass Electric Charge. m e = 9.

Electrostatics 1) electric charge: 2 types of electric charge: positive and negative 2) charging by friction: transfer of electrons from one object to another 3) positive object: lack of electrons negative

### Chapter 10. Electrostatics

Chapter 10 Electrostatics 3 4 AP Physics Multiple Choice Practice Electrostatics 1. The electron volt is a measure of (A) charge (B) energy (C) impulse (D) momentum (E) velocity. A solid conducting sphere

### PHYSICS - CLUTCH CH 22: ELECTRIC FORCE & FIELD; GAUSS' LAW

!! www.clutchprep.com CONCEPT: ELECTRIC CHARGE e Atoms are built up of protons, neutrons and electrons p, n e ELECTRIC CHARGE is a property of matter, similar to MASS: MASS (m) ELECTRIC CHARGE (Q) - Mass

### SPH 4U: Unit 3 - Electric and Magnetic Fields

Name: Class: _ Date: _ SPH 4U: Unit 3 - Electric and Magnetic Fields Modified True/False (1 point each) Indicate whether the statement is true or false. If false, change the identified word or phrase to

### The third charge has to be along the line joining the two charges, outside the two charges, and closer to the weaker.

Coordinator: Dr. M.F.Al-Kuhaili Thursday, uly 30, 2015 Page: 1 Q1. Two point charges q and 4q are at x = 0 and L, respectively. A third charge q is to be placed such that the net force on it is zero. What

### Consider a point P on the line joining the two charges, as shown in the given figure.

Question 2.1: Two charges 5 10 8 C and 3 10 8 C are located 16 cm apart. At what point(s) on the line joining the two charges is the electric potential zero? Take the potential at infinity to be zero.

### Questions Chapter 22 Electric Fields

Questions Chapter 22 Electric Fields 22-1 What is Physics? 22-2 The Electric Field 22-3 Electric Field Lines 22-4 Electric Field due to a Point Charge 22-5 Electric Field due to an Electric Dipole 22-6

### LESSON 2 PHYSICS NOTES

LESSON 2 ELECTROSTATIC POTENTIAL AND CAPACITANCE SECTION I ELECTROSTATIC POTENTIAL ELECTRIC FIELD IS CONSERVATIVE In an electric field work done by the electric field in moving a unit positive charge from

### You should be able to demonstrate and show your understanding of:

OCR B Physics H557 Module 6: Field and Particle Physics You should be able to demonstrate and show your understanding of: 6.1: Fields (Charge and Field) Field: A potential gradient Field Strength: Indicates

### EL FORCE and EL FIELD HW-PRACTICE 2016

1 EL FORCE and EL FIELD HW-PRACTICE 2016 1.A difference between electrical forces and gravitational forces is that electrical forces include a. separation distance. b. repulsive interactions. c. the inverse

### Q1. Three point charges are arranged as shown in FIGURE 1. Find the magnitude of the net electrostatic force on the point charge at the origin.

Coordinator: Saleem Rao Monday, May 01, 2017 Page: 1 Q1. Three point charges are arranged as shown in FIGURE 1. Find the magnitude of the net electrostatic force on the point charge at the origin. A) 1.38

1. ELECTROSTATICS GIST Electrostatics is the study of charges at rest. The intrinsic property of fundamental particle of matter which give rise to electric force between objects is called charge. Charging

### Physics 222, Spring 2010 Quiz 3, Form: A

Physics 222, Spring 2010 Quiz 3, Form: A Name: Date: Instructions You must sketch correct pictures and vectors, you must show all calculations, and you must explain all answers for full credit. Neatness

### AP Physics C Electricity & Magnetism Mid Term Review

AP Physics C Electricity & Magnetism Mid Term Review 1984 37. When lighted, a 100-watt light bulb operating on a 110-volt household circuit has a resistance closest to (A) 10-2 Ω (B) 10-1 Ω (C) 1 Ω (D)

### INDIAN SCHOOL MUSCAT Department of Physics Class : XII Physics Worksheet - 1 ( ) Electric Charges and Fields

INDIAN SCHOOL MUSCAT Department of Physics Class : XII Physics Worksheet - 1 (2017-2018) Electric Charges and Fields Section A Conceptual and application type Questions 1 What happens to the electric field

### Physics 126 Fall 2004 Practice Exam 1. Answer will be posted about Oct. 5.

Physics 126 Fall 2004 Practice Exam 1. Answer will be posted about Oct. 5. 1. Which one of the following statements best explains why tiny bits of paper are attracted to a charged rubber rod? A) Paper

### IB-1 Physics Electrostatics Practice Questions. e +4e A. B. C. D.

1. A plastic rod is rubbed with a cloth. At the end of the process, the rod is found to be positively charged and the cloth is found to be uncharged. This involves the movement of A. positive charge from

### AP Physics Study Guide Chapter 17 Electric Potential and Energy Name. Circle the vector quantities below and underline the scalar quantities below

AP Physics Study Guide Chapter 17 Electric Potential and Energy Name Circle the vector quantities below and underline the scalar quantities below electric potential electric field electric potential energy

LEVEL 1 1. How many electrons will have a total charge of 1 coulomb? 2. Find the electric field intensity due to a charge of 5 10-8 C at a point 50 cm from it in vacuum 3. An electric charge of 2 c experience

### General Physics (PHY 2140)

General Physics (PHY 2140) Lecture 2 Electrostatics Electric flux and Gauss s law Electrical energy potential difference and electric potential potential energy of charged conductors http://www.physics.wayne.edu/~alan/

### Phys102 Second Major-181 Zero Version Coordinator: Kunwar, S Monday, November 19, 2018 Page: 1

Coordinator: Kunwar, S Monday, November 19, 2018 Page: 1 Q1. A neutral metal ball is suspended by a vertical string. When a positively charged insulating rod is placed near the ball (without touching),

### PHYS1212 Exam#2 Spring 2014

PHYS Exam# Spring 4 NAME There are 9 different pages in this quiz. Check now to see that you have all of them. CEDIT PAT A 6% PAT B 4% TOTAL % GADE All work and answers must be given in the spaces provided

### 4. Theunitsoftheelectric eldare: A. N C 2 B. C/N C. N D. N/C E. C=m 2 ans: D Section: 22{2; Di±culty: E. Chapter 22: ELECTRIC FIELDS 377

Chapter 22: ELECTRIC FIELDS 1 An electric eld 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

### Chapter 21. Electric Fields

Chapter 21 Electric Fields The Origin of Electricity The electrical nature of matter is inherent in the atoms of all substances. An atom consists of a small relatively massive nucleus that contains particles

### HOMEWORK 1 SOLUTIONS

HOMEWORK 1 SOLUTIONS CHAPTER 18 3. REASONING AND SOLUTION The total charge to be removed is 5.0 µc. The number of electrons corresponding to this charge is N = ( 5.0 10 6 C)/( 1.60 10 19 C) = 3.1 10 13

### Electric Force and Electric Field Practice Problems PSI AP Physics 1

Electric Force and Electric Field Practice Problems PSI AP Physics 1 Name Multiple Choice 1. A plastic rod is rubbed with a piece of wool. During the process the plastic rod acquires a negative charge

### To receive full credit, you must show your work (including calculations and formulas used).

Page Score Problem : Problem 2: Problem 3: Problem 4: Problem 5: TOTAL: (25 pts) To receive full credit, you must show your work (including calculations and formulas used). If you do not wish your quiz

### ELECTROSTATIC CBSE BOARD S IMPORTANT QUESTIONS OF 1 MARKS

ELECTROSTATIC CBSE BOARD S IMPORTANT QUESTIONS OF 1 MARKS 1. Name any two basic properties of electric charge. [1] 2. Define the term electric dipole-moment. [1] 3. Write the physical quantity, which has

### 47 CHARGE. 1. What are the basic particles of charge?

47 CHARGE 1. What are the basic particles of charge? 2. There are three variables for charge listed to the right. Tell the typical circumstances when each is used. 3. Charge What are the units of charge?

### Chapter Electrostatic Potential and Capacitance

Chapter Electrostatic Potential and Capacitance C/ 2 C/2 Ans: Q6. MockTime.com Q1. A 4µF conductor is charged to 400 volts and then its plates are joined through a resistance of 1 kω. The heat produced

### Phys222 S11 Quiz 2: Chapters Name: = 80 nc, and q = 24 nc in the figure, what is the magnitude of the total electric force on q?

Name: 1. Three point charges are positioned on the x axis. If the charges and corresponding positions are +3 µc at x = 0, +0 µc at x = 40 cm, and 60 µc at x = 60 cm, what is the magnitude of the electrostatic

### A) I B) II C) III D) IV E) V

1. A square loop of wire moves with a constant speed v from a field-free region into a region of uniform B field, as shown. Which of the five graphs correctly shows the induced current i in the loop as

### F 13. The two forces are shown if Q 2 and Q 3 are connected, their charges are equal. F 12 = F 13 only choice A is possible. Ans: Q2.

Q1. Three fixed point charges are arranged as shown in Figure 1, where initially Q 1 = 10 µc, Q = 15 µc, and Q 3 = 5 µc. If charges Q and Q 3 are connected by a very thin conducting wire and then disconnected,

### Section 16.1 Potential Difference and Electric Potential

PROBLEMS 1, 2, 3 = straightforward, intermediate, challenging = full solution available in Student Solutions Manual/Study Guide = biomedical application Section 16.1 Potential Difference and Electric Potential

### Physics. Student Materials Advanced Higher. Tutorial Problems Electrical Phenomena HIGHER STILL. Spring 2000

Spring 2000 HIGHER STILL Physics Student Materials Advanced Higher Tutorial Problems Electrical Phenomena TUTORIAL 1 Coulomb's Inverse Square Law 1 A charge of 2.0 x 10-8 C is placed a distance of 2.0

### Q1. A wave travelling along a string is described by

Coordinator: Saleem Rao Wednesday, May 24, 2017 Page: 1 Q1. A wave travelling along a string is described by y( x, t) = 0.00327 sin(72.1x 2.72t) In which all numerical constants are in SI units. Find the

### 4 pt. (in J) 3.A

Mark Reeves - Physics 22, Fall 2011 1 A point charge of mass 0.0699 kg and charge q = +6.87 µc is suspended by a thread between the vertical parallel plates of a parallel-plate capacitor, as shown in the

### CHAPTER 15 PRE-TEST: ELECTRIC FORCE AND FIELDS

Class: Date: CHAPTER 5 PRE-TEST: ELECTRIC FORCE AND FIELDS Multiple Choice Identify the choice that best completes the statement or answers the question.. What happens when a rubber rod is rubbed with

### Electric Potential Practice Problems

Electric Potential Practice Problems AP Physics Name Multiple Choice 1. A negative charge is placed on a conducting sphere. Which statement is true about the charge distribution (A) Concentrated at the

### Physics 420 Fall 2004 Quiz 1 Wednesday This quiz is worth 6 points. Be sure to show your work and label your final answers.

Quiz 1 Wednesday This quiz is worth 6 points. Be sure to show your work and label your final answers. 1. A charge q 1 = +5.0 nc is located on the y-axis, 15 µm above the origin, while another charge q

### Electric Potential Energy

Electric Potential Energy the electric potential energy of two charges depends on the distance between the charges when two like charges are an infinite distance apart, the potential energy is zero An

### Ch. 16 and 17 Review Problems

Ch. 16 and 17 Review Problems NAME 1) Is it possible for two negative charges to attract each other? A) Yes, they always attract. B) Yes, they will attract if they are close enough. C) Yes, they will attract

### PHYSICS 122D, Winter 2009, Version A Exam 2, PAGE 1

NAME: Last, First STUDENT ID NUMBER 1. [6 points] Two small spheres, each with mass m = 5.0 g and charge q, are suspended from a point by threads of length L = 0.30 m. What is the charge on each sphere

### PHYS 102 SECOND MAJOR EXAM TERM 011

PHYS 102 SECOND MAJOR EXAM TERM 011 * QUESTION NO: 1 An infinite non-conducting sheet has a surface charge density 0.10*10**(-6) C/m**2 on one side. How far apart are equipotential surfaces whose potentials

### Electrostatics. Electrical properties generated by static charges. Introduction

Electrostatics Electrical properties generated by static charges Introduction First Greek discovery Found that amber, when rubbed, became electrified and attracted pieces of straw or feathers Introduction

### Electrostatic Potential and Capacitance Examples from NCERT Text Book

Electrostatic Potential and Capacitance Examples from NCERT Text Book 1. (a) Calculate the potential at a point P due to a charge of 4 10 located 9 cm away. (b) Hence obtain the done in bringing a charge

### Electric Fields Practice Multiple Choice

Choose the best response and place your answers, using HB pencil, on the Scantron sheet provided. 1. The number of excess electrons that must be collected on a sphere to give it a charge of 5.6 x 10 6

### Exam 1 Solutions. The ratio of forces is 1.0, as can be seen from Coulomb s law or Newton s third law.

Prof. Eugene Dunnam Prof. Paul Avery Feb. 6, 007 Exam 1 Solutions 1. A charge Q 1 and a charge Q = 1000Q 1 are located 5 cm apart. The ratio of the electrostatic force on Q 1 to that on Q is: (1) none

### MAGNETIC EFFECT OF CURRENT

MAGNETIC EFFECT OF CURRENT VERY SHORT ANSWER QUESTIONS Q.1 Who designed cyclotron? Q.2 What is the magnetic field at a point on the axis of the current element? Q.3 Can the path of integration around which

### Física Básica Experimental I Cuestiones Tema VII. Electrostática. Soluciones incluidas. 1.

1. A cubical surface with no charge enclosed and with sides 2.0 m long is oriented with right and left faces perpendicular to a uniform electric field E of (1.6 10 5 N/C) î. The net electric flux E through

### AP* Electrostatics Free Response Questions

AP* Electrostatics Free Response Questions 1987 Q2 Object I, shown above, has a charge of +3 10 6 coulomb and a mass of 0.0025 kilogram. (a) What is the electric potential at point P, 0.30 meter from object

### Chapter Electric Forces and Electric Fields. Prof. Armen Kocharian

Chapter 25-26 Electric Forces and Electric Fields Prof. Armen Kocharian First Observations Greeks Observed electric and magnetic phenomena as early as 700 BC Found that amber, when rubbed, became electrified

### PHYSICS 12 NAME: Electrostatics Review

NAME: Electrostatics Review 1. An electron orbits a nucleus which carries a charge of +9.6 x10-19 C. If the electron s orbital radius is 2.0 x10-10 m, what is its electric potential energy? A. -6.9 x10-18

### Ch 17 Problem Set 31. A toaster is rated at 600 W when connected to a 120-V source. What current does the toaster carry, and what is its resistance?

Ch 17 Problem Set 31. A toaster is rated at 600 W when connected to a 120-V source. What current does the toaster carry, and what is its resistance? 33. How many 100-W lightbulbs can you use in a 120-V

### 4 r 2. r 2. Solved Problems

CHAP. 24] COULOMB'S LAW AND ELECTRIC FIELDS 233 AN ELECTRIC FIELD is said to exist at any point in space when a test charge, placed at that point, experiences an electrical force. The direction of the

### 2R R R 2R. Phys Test 1

Group test. You want to calculate the electric field at position (x o, 0, z o ) due to a charged ring. The ring is centered at the origin, and lies on the xy plane. ts radius is and its charge density

### C Electric Force & Field Practice Problems PSI Physics

C Electric Force & Field Practice Problems PSI Physics Name Multiple Choice 1. A plastic rod is rubbed with a piece of wool. During the process the plastic rod acquires a positive charge and the wool:

### [1] (b) State one difference and one similarity between the electric field of a point charge and the gravitational field of a point mass....

1 (a) An electric field always exists around a charged particle. Explain what is meant by an electric field.... [1] (b) State one difference and one similarity between the electric field of a point charge

### Exam 1--PHYS 102--S14

Class: Date: Exam 1--PHYS 102--S14 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. The magnitude of the charge on an electron is approximately: a. 10-23

### Electrostatics Test Review Hons. All work must be shown,including givens, equations used, and units. Draw diagrams as appropriate.

Electrostatics Test Review Hons. All work must be shown,including givens, equations used, and units. Draw diagrams as appropriate. 1. If a charged rod A attracts another rod B, you can conclude that a.

### Book page. Coulombs Law

Book page Coulombs Law A Coulomb torsion balance A Coulomb torsion balance is used to measure the force between two charged objects Coulomb's Torsion Balance Two conducting spheres fixed on insulating

### +2Q -2Q. (a) 672 N m 2 /C (b) 321 N m 2 /C (c) 105 N m 2 /C (d) 132 N m 2 /C (e) 251 N m 2 /C

1. The figure below shows 4 point charges located on a circle centered about the origin. The exact locations of the charges on the circle are not given. What can you say about the electric potential created

### r 2 and the charge on a proton is +e. We never see objects that have a charge which is not a whole number multiple of this number.

Name: Physics Chapter 16 Study Guide ----------------------------------------------------------------------------------------------------- Useful Information: e = 1.6"10 #19 C mass electron = 9.11"10 #31

### ELECTRIC FORCES AND ELECTRIC FIELDS

chapter ELECTRIC FORCES AND ELECTRIC FIELDS www.tutor-homework.com (for tutoring, homework help, or help with online classes) Section 18.1 The Origin of Electricity Section 18.2 Charged Objects and the

### ELECTROSTATIC FIELDS

ELECTROSTATIC FIELDS Electric charge Ordinary matter is made up of atoms which have positively charged nuclei and negatively charged electrons surrounding them. A body can become charged if it loses or

### Two point charges, A and B, lie along a line separated by a distance L. The point x is the midpoint of their separation.

Use the following to answer question 1. Two point charges, A and B, lie along a line separated by a distance L. The point x is the midpoint of their separation. 1. Which combination of charges would yield

### End-of-Chapter Exercises

End-of-Chapter Exercises Exercises 1 12 are primarily conceptual questions designed to see whether you understand the main concepts of the chapter. 1. (a) If the electric field at a particular point is