# 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.

Size: px
Start display at page:

Download "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."

Transcription

1 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, the net electric force that now acts on charge Q 1 is: A) (+000 î ĵ ) N B) ( 000î 000 ĵ ) N C) (+1500 î ĵ ) N D) ( 1500î 500 ĵ ) N E) (+000 î ĵ ) N F 13 F 1 The two forces are shown if Q and Q 3 are connected, their charges are equal. F 1 = F 13 only choice A is possible. Q. A particle of charge q 1 = C is placed at the origin of the x-axis. Two other particles of charges q and q 3 are placed at x = 1 cm and x 3 = 3 cm, respectively, as shown in Figure. How many electrons or protons should charge q have in order to create a zero net electric force on charge q 3? A) Four protons B) Four electrons C) Six protons D) Six electrons E) Three electrons Assume q 3 is + q must be + F 31 = F 3 : kq 1q 3 = kq q q = 4q 1 = = = 4 protons Answer is the same if q 3 is (-).

2 Coordinator: Wednesday, November 30, 011 Page: 1 Q3. A proton of initial velocity m/s enters a uniform electric field of strength 3.0 N/C. The initial velocity of the proton and the electric field are in the same direction. The distance travelled by the proton in a time t =.0 µs is: (Ignore the gravitational force) A) 4.6 mm B) 3.7 mm C) 1.0 mm D).8 mm E) 6.8 mm a = qe m 1 at = qet m = = m v i t = = m x = v i t + 1 at = 4.6 mm Q4. An electric dipole consists of two particles, each having a charge of magnitude.0 nc. It is placed in an external electric field of magnitude 500 N/C. The electric potential energy of the dipole is.0 nj when it makes an angle of 60 o with the field. What is the separation between the two charges of the dipole? A) 4.0 mm B).0 mm C) 8.0 mm D) 6.0 mm E) 10 mm U = P. E = pe cosθ = qde cosθ d = U qe cosθ = = m c-0-n-0-s-0-e-1-fg-1-fo-0

3 Coordinator: Wednesday, November 30, 011 Page: Q5. Four particles, with the same magnitude of charge, are placed at the corners of a square, as shown in Figure 3. Which configuration gives an electric field, at the center of the square, pointing to the right? Figure A A) 3 B) 1 C) 4 D) E) 5 Q6. The electric field at point P just outside the outer surface of a hollow spherical conductor of inner radius 10 cm and outer radius 0 cm has magnitude 450 N/C and is directed outward. When an unknown point charge Q is placed at the center of the sphere, the electric field at point P is still pointing outward but is now 180 N/C. What is the value of charge Q? A) 1. nc B) +1. nc C) 3.4 nc D) +3.4 nc E) 5.0 nc q net = Er k q tot = E r k q tot = q net + Q = = +.0 nc = = +0.8 nc Q = q tot q net = = 1. nc c-0-n-0-s-0-e-1-fg-1-fo-0

4 Coordinator: Wednesday, November 30, 011 Page: 3 Q7. A uniform electric field is given by: E = ˆi + 4ˆj 5kˆ (N/C). A square plate, of side 10 cm, lies in the xy plane. What is the value of the electric flux through the plate? A) 0.05 N.m /C B) 0.0 N.m /C C) 0.04 N.m /C D) 0.06 N.m /C E) 0.07 N.m /C A = ±0.01 k Φ = E. A = (0.01)(5) = 0.05 N. m C Q8. Figure 9 shows, in cross section, three infinitely large parallel and flat nonconducting sheets on which charge is uniformly distributed. The surface charge densities are σ 1 = +.00 µc/m, σ = µc/m, and σ 3 = 3.00 µc/m, and distance L = 1.50 cm. In units of N/C, what is the net electric field at point P? A) ĵ B) ĵ C) ĵ D) ĵ E) ĵ σ net = = +4 µc/m E is upward (+ȷ ) E net = σ net ϵ 0 = = N C c-0-n-0-s-0-e-1-fg-1-fo-0

5 Coordinator: Wednesday, November 30, 011 Page: 4 Q9. A solid isolated charged conductor is in electrostatic equilibrium. Choose the TRUE statement: A) Any excess charge is confined to the surface of the conductor. B) Excess charge is distributed throughout the volume of the conductor. C) There is an electric field inside the conductor. D) There is no electric field at the surface of the conductor. E) Electric flux through a Gaussian surface inside the conductor is non-zero. A Q10. Two infinitely long lines of charge are shown in Figure 5. What is the electric field at P? A) 18 (N/C), to the left B) 18 (N/C), to the right C) 9.0 (N/C), to the left D) 9.0 (N/C), to the right E) Zero E = kλ r E 1 = E = = 18 N to the right C = 36 N to the left C E net = E E 1 = 18 N to the left C c-0-n-0-s-0-e-1-fg-1-fo-0

6 Coordinator: Wednesday, November 30, 011 Page: 5 Q11. Figure 4 shows an electron moving to the right between two parallel charged plates. The electric potentials of the plates are V 1 = 70 V and V = 50 V. What is the change in the kinetic energy of the electron as it moves from the left to the right plate? A) J -18 B) J -18 C) J -18 D) J E) J U = q. V = ( ) = J K + U = 0 K = U = J Q1. Consider two conducting spheres A and B. Sphere A has radius R A and carries charge q. Sphere B has radius R B = 3R A and initially uncharged. Sphere A is far from sphere B. The spheres are connected with a thin conducting wire. After the connection, what is the ratio of the charge on A to that on B (q A /q B )? A) 1/3 B) 1 C) 1/9 D) 3 E) 9 V A = k. q A / R A V B = k. q B / R B = k. q B / 3R A After connection: V A = V B k. q A R A = k. q B 3R A q A q B = 1 3 c-0-n-0-s-0-e-1-fg-1-fo-0

7 Coordinator: Wednesday, November 30, 011 Page: 6 Q13. Three charged particles, q 1 = +10 nc, q = 0 nc, and q 3 = +30 nc, are positioned at the corners of a triangle, as shown in Figure 6. If a = 10 cm and b = 6.0 cm, how much work must be done by an external agent to move q 3 to infinity? A) J -5 B) J -5 C) J -5 D).7 10 J E) zero U i = kq 1q b + kq 1q 3 a + kq q 3 a U f = kq 1q b U = U f U i = kq 3 a (q 1 + q ) = = J W ext = U = J ( 10) 10 9 Q14. The electric potential (in volts) in a certain region of space is given by V = 3xy. What is the magnitude of the electric field (in units of V/m) at the point (1.0 m, 1.0 m)? A) 4. B).3 C) 3.0 D) 6.0 E) 5.5 Ans. E x = V x = 3y E y = V y = 3x at (1.0, 1.0): E = 3ı 3ȷ E = 3 = 4. V m c-0-n-0-s-0-e-1-fg-1-fo-0

8 Coordinator: Wednesday, November 30, 011 Page: 7 Q15. Q16. Consider the four charges distributed as shown in Figure 8. What is the net electric potential at point P due to the four charges, if V = 0 at infinity, q = 10 nc, and d = 10 cm? A) +900 V B) 900 V C) Zero D) +300 V E) 300 V The (+q)and ( q) cancel each other V p = kq zd + kq d = kq d = = +900 V Two conductors, insulated from each other, are charged by transferring electrons from one conductor to the other. After electrons have been transferred, the potential difference between the conductors is 1 V. What is the capacitance of the system? A) 33 nf B) 1 nf C).5 nf D) 4.8 nf E) 18 nf Q = = C C = Q V = = 33 nf Q17. Consider an isolated charged parallel plate capacitor. If the plate separation is decreased while the plate area is fixed, which of the following quantities will decrease? A A) the energy stored by the capacitor B) the charge on the capacitor (X isolated) C) the capacitance of the capacitor (X increase) D) the electric field between the plates(x E = V d = q ϵ 0 A constant) E) the energy density of the electric field (X u = 1 ϵ 0 E = constant) c-0-n-0-s-0-e-1-fg-1-fo-0

9 Coordinator: Wednesday, November 30, 011 Page: 8 Q18. Determine the equivalent capacitance of the circuit shown in Figure 7. A) 4.0 µf B) 9.5 µf C) 16 µf D) 7.6 µf E) 1.3 µf C 1 = C 1 + C = 8µF C 1 C C 3 C eq = C 1. C 3 = 8 8 = 4.0 µf C 1 + C Q19. What is the charge on each plate on the -µf capacitor in Figure 7? A) 10 µc B) 0 µc C) 30 µc D) 60 µc E) 80 µc Q0. q eq = C eq. V = 4 10 = 40 µc = q 3 = q 1 V 1 = q 1 c 1 = 40 8 = 5.0V = V 1 = V q = C. V = 5 = 10 µc A 10 pf parallel plate capacitor is charged with a 4.0 V battery. While the capacitor is still connected to the battery, a dielectric slab (κ = 5.0) is inserted between the plates to completely fill the gap. How much electric potential energy is stored in the capacitor after inserting the dielectric? A) J -11 B) J -11 C).0 10 J -11 D) J -10 E) J U = 1 CV = 1 kc 0V = = J c-0-n-0-s-0-e-1-fg-1-fo-0

### is at the origin, and charge q μc be located if the net force on q

Term: 152 Saturday, April 09, 2016 Page: 1 Q1. Three point charges are arranged along the x-axis. Charge q 3.0 0 μc 1 is at the origin, and charge q 5.0 0 μc 2 is at x = 0.200 m. Where should a third charge

### 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

### 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

### 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),

### Reading: Electrostatics 3. Key concepts: Capacitance, energy storage, dielectrics, energy in the E-field.

Reading: Electrostatics 3. Key concepts: Capacitance, energy storage, dielectrics, energy in the E-field. 1.! Questions about charging and discharging capacitors. When an uncharged capacitor is connected

### Phys102 Second Major-133 Zero Version Coordinator: A.A.Naqvi Tuesday, August 05, 2014 Page: 1

Coordinator: A.A.Naqvi Tuesday, August 05, 2014 Page: 1 Q1. igure 1 shows four situations in which a central proton (P) is surrounded by protons or electrons fixed in place along a half-circle. The angles

### F = Q big = c) The electric potential in a certain region of space can be described by the equation: 16y2 (1 + z 2 ) V (x, y, z) = 10x

1) Short Answer (4 points each)(show YOUR WORK) a) A 3.0 nc (positive) charge and a 1.0 nc (negative) charge are located 0.80 m apart from each other. What is the force on the 3.0 nc (positive) charge

### Physics (

Exercises Question 2: Two charges 5 0 8 C and 3 0 8 C are located 6 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

### Phys222 W16 Exam 2: Chapters Key. Name:

Name: Please mark your answer here and in the scantron. A positively charged particle is moving in the +y-direction when it enters a region with a uniform electric field pointing in the +y-direction. Which

### Chapter 23 Term083 Term082

Chapter 23 Term083 Q6. Consider two large oppositely charged parallel metal plates, placed close to each other. The plates are square with sides L and carry charges Q and Q. The magnitude of the electric

### 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

### 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

### Figure 1 A) 2.3 V B) +2.3 V C) +3.6 V D) 1.1 V E) +1.1 V Q2. The current in the 12- Ω resistor shown in the circuit of Figure 2 is:

Term: 13 Wednesday, May 1, 014 Page: 1 Q1. What is the potential difference V B -V A in the circuit shown in Figure 1 if R 1 =70.0 Ω, R=105 Ω, R 3 =140 Ω, ε 1 =.0 V and ε =7.0 V? Figure 1 A).3 V B) +.3

### 2 Coulomb s Law and Electric Field 23.13, 23.17, 23.23, 23.25, 23.26, 23.27, 23.62, 23.77, 23.78

College of Engineering and Technology Department of Basic and Applied Sciences PHYSICS I Sheet Suggested Problems 1 Vectors 2 Coulomb s Law and Electric Field 23.13, 23.17, 23.23, 23.25, 23.26, 23.27,

### 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

### 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

### 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

### Electric Field of a uniformly Charged Thin Spherical Shell

Electric Field of a uniformly Charged Thin Spherical Shell The calculation of the field outside the shell is identical to that of a point charge. The electric field inside the shell is zero. What are the

### 1. Short Answer (25 points total)

Physics 116b First Practice Examination Due September 19, 2001 Name: Please circle your section: Section 1 Section 2 Section 3 Section 4 I nstructions This is practice for a one hour, closed book examination.

### 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

### 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

### Department of Physics. PHYS MAJOR 2 EXAM Test Code: 015. Monday 1 st May 2006 Exam Duration: 2hrs (from 6:30pm to 8:30pm)

Department of Physics PHYS1005 MJOR EXM Test Code: 015 Monday 1 st May 006 Exam Duration: hrs (from 6:30pm to 8:30pm) Name: Student Number: Section Number: Version 15 Page 1 1. Each of the four capacitors

### Exam 1 Solutions. Note that there are several variations of some problems, indicated by choices in parentheses. Problem 1

Exam 1 Solutions Note that there are several variations of some problems, indicated by choices in parentheses. Problem 1 A rod of charge per unit length λ is surrounded by a conducting, concentric cylinder

### 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

### 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

### 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

### 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

### 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.

### Phys102 Second Major-161 Zero Version Coordinator: Dr. Naqvi Monday, December 12, 2016 Page: 1

Coordinator: Dr. Naqvi Monday, December 12, 2016 Page: 1 Q1. Two point charges, with charges q1 and q2, are placed a distance r apart. Which of the following statements is TRUE if the electric field due

### 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).

### Chapter 25. Capacitance

Chapter 25 Capacitance 1 1. Capacitors A capacitor is a twoterminal device that stores electric energy. 2 2. Capacitance The figure shows the basic elements of any capacitor two isolated conductors of

### 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

---------------------------------------------------------------------------------------------------------- PHYS 2326 University Physics II Class number ---------------------------------------------------------------------------------------------------------------------

### PHYS 241 EXAM #1 October 5, 2006

1. ( 5 points) Two point particles, one with charge 8 10 9 C and the other with charge 2 10 9 C, are separated by 4 m. The magnitude of the electric field (in N/C) midway between them is: A. 9 10 9 B.

### 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

### 104 Practice Exam 1-2/21/02

104 Practice Exam 1-2/21/02 1. One mole of a substance contains 6.02 > 10 23 protons and an equal number of electrons. If the protons could somehow be separated from the electrons and placed in separate

### shown in Fig. 4, is initially uncharged. How much energy is stored in the two capacitors after the switch S is closed for long time?

Chapter 25 Term 083 Q13. Each of the two 25-µF capacitors, as shown in Fig. 3, is initially uncharged. How many Coulombs of charge pass through ammeter A after the switch S is closed for long time? A)

### 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

### 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

### Which one of the pipes emits sound with the lowest frequency? Which one of the pipes emits sound with the next lowest frequency?

The figures show standing waves of sound in six organ pipes of the same length. Each pipe has one end open and the other end closed. Warning: some of the figures show situations that are not possible.

### 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

### W05D1 Conductors and Insulators Capacitance & Capacitors Energy Stored in Capacitors

W05D1 Conductors and Insulators Capacitance & Capacitors Energy Stored in Capacitors W05D1 Reading Assignment Course Notes: Sections 3.3, 4.5, 5.1-5.4 1 Outline Conductors and Insulators Conductors as

### Chapter 19 Electric Potential and Electric Field

Chapter 19 Electric Potential and Electric Field The electrostatic force is a conservative force. Therefore, it is possible to define an electrical potential energy function with this force. Work done

### Profs. D. Acosta, A. Rinzler, S. Hershfield. Exam 1 Solutions

PHY2049 Spring 2009 Profs. D. Acosta, A. Rinzler, S. Hershfield Exam 1 Solutions 1. What is the flux through the right side face of the shown cube if the electric field is given by E = 2xî + 3yĵ and the

### Electric Potential Energy Chapter 16

Electric Potential Energy Chapter 16 Electric Energy and Capacitance Sections: 1, 2, 4, 6, 7, 8, 9 The electrostatic force is a conservative force It is possible to define an electrical potential energy

### 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

### 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

### 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

### 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

### 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

### 1. zero. Where an electric field line crosses an equipotential surface, the angle between the field line and the equipotential is

Week 5 Where an electric field line crosses an equipotential surface, the angle between the field line and the equipotential is 1. zero 2. between zero and 90 3. 90 4. not enough information given to

### Chapter 24 Capacitance and Dielectrics

Chapter 24 Capacitance and Dielectrics 1 Capacitors and Capacitance A capacitor is a device that stores electric potential energy and electric charge. The simplest construction of a capacitor is two parallel

### PHY294 Exam #1 Name: Student #: Show work for problems where indicated. Include units in answer.

PHY294 Exam #1 Name: Student #: Show work for problems where indicated. Include units in answer. Some physical constants: e=1.6 X 10-19 C m e = 9.1 X 10-31 kg m p = 1.67 X 10-27 kg g = 9.83 N/kg ε o =

### 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)

### Question 1. The figure shows four pairs of charged particles. For each pair, let V = 0 at infinity and consider V net at points on the x axis.

Question 1 The figure shows four pairs of charged particles. For each pair, let V = 0 at infinity and consider V net at points on the x axis. For which pairs is there a point at which V net = 0 between

### Second Major Solution Q1. The three capacitors in the figure have an equivalent capacitance of 2.77 µf. What is C 2?

Secon Major Solution Q1. The three capacitors in the figure have an equivalent capacitance of.77 µf. What is C? C 4.0 µf.0 µf A) 7 µf B) µf C) 4 µf D) 3 µf E) 6 µf Q. When the potential ifference across

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

### Hollow Conductors. A point charge +Q is placed at the center of the conductors. The induced charges are: 1. Q(I1) = Q(I2) = -Q; Q(O1) = Q(O2)= +Q

O2 I2 O1 I1 Hollow Conductors A point charge +Q is placed at the center of the conductors. The induced charges are: 1. Q(I1) = Q(I2) = -Q; Q(O1) = Q(O2)= +Q 2. Q(I1) = Q(I2) = +Q; Q(O1) = Q(O2)= -Q 3.

### Exam 2 Practice Problems Part 1

MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Physics Exam 2 Practice Problems Part 1 Problem 1 Electric Field and Charge Distributions from Electric Potential An electric potential V ( z ) is described

### 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

### LAST Name (print) ALL WORK MUST BE SHOWN FOR THE FREE RESPONSE QUESTION IN ORDER TO RECEIVE FULL CREDIT.

Physics 107 LAST Name (print) First Mid-Term Exam FIRST Name (print) Summer 2013 Signature: July 5 UIN #: Textbooks, cell phones, or any other forms of wireless communication are strictly prohibited in

### 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

### Electrical Energy and Capacitance

6 Electrical Energy and Capacitance QUICK QUIZZES. Choice. The field exerts a force on the electron, causing it to accelerate in the direction opposite to that of the field. In this process, electrical

### 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

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

### Exam 1 Solution. Solution: Make a table showing the components of each of the forces and then add the components. F on 4 by 3 k(1µc)(2µc)/(4cm) 2 0

PHY2049 Fall 2010 Profs. S. Hershfield, A. Petkova Exam 1 Solution 1. Four charges are placed at the corners of a rectangle as shown in the figure. If Q 1 = 1µC, Q 2 = 2µC, Q 3 = 1µC, and Q 4 = 2µC, what

### 4) A 3.0 pf capacitor consists of two parallel plates that have surface charge densities of 1.0

Quantitative 3) Two parallel plates are separated by 1.0 mm. If the potential difference between them is 2.0 V, what is the magnitude of their surface charge densities? A) 18 nc/m2 4) A 3.0 pf capacitor

### 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

### Electric Potential. Capacitors (Chapters 28, 29)

Electric Potential. Capacitors (Chapters 28, 29) Electric potential energy, U Electric potential energy in a constant field Conservation of energy Electric potential, V Relation to the electric field strength

### Phys2120 Spring 2017 Practice Exam 1. Chapters Name

Name 1. Two point charges are 4 cm apart. They are moved to a new separation of 2 cm. By what factor does the resulting mutual force between them change? 2. An uncharged conductor is supported by an insulating

### Electric Potential Energy Conservative Force

Electric Potential Energy Conservative Force Conservative force or field is a force field in which the total mechanical energy of an isolated system is conserved. Examples, Gravitation, Electrostatic,

### Energy Stored in Capacitors

Energy Stored in Capacitors U = 1 2 qv q = CV U = 1 2 CV 2 q 2 or U = 1 2 C 37 Energy Density in Capacitors (1) We define the, u, as the electric potential energy per unit volume Taking the ideal case

### Q1. Ans: (1.725) =5.0 = Q2.

Coordinator: Dr. A. Naqvi Wednesday, January 11, 2017 Page: 1 Q1. Two strings, string 1 with a linear mass density of 1.75 g/m and string 2 with a linear mass density of 3.34 g/m are tied together, as

### Capacitors (Chapter 26)

Capacitance, C Simple capacitive circuits Parallel circuits Series circuits Combinations Electric energy Dielectrics Capacitors (Chapter 26) Capacitors What are they? A capacitor is an electric device

### Chapter 17. Electric Potential Energy and the Electric Potential

Chapter 17 Electric Potential Energy and the Electric Potential Consider gravity near the surface of the Earth The gravitational field is uniform. This means it always points in the same direction with

### Review. Spring Semester /21/14. Physics for Scientists & Engineers 2 1

Review Spring Semester 2014 Physics for Scientists & Engineers 2 1 Notes! Homework set 13 extended to Tuesday, 4/22! Remember to fill out SIRS form: https://sirsonline.msu.edu Physics for Scientists &

### Physics 196 Final Test Point

Physics 196 Final Test - 120 Point Name You need to complete six 5-point problems and six 10-point problems. Cross off one 5-point problem and one 10-point problem. 1. Two small silver spheres, each with

### Physics 2212 GH Quiz #2 Solutions Spring 2015

Physics 2212 GH uiz #2 Solutions Spring 2015 Fundamental Charge e = 1.602 10 19 C Mass of an Electron m e = 9.109 10 31 kg Coulomb constant K = 8.988 10 9 N m 2 /C 2 Vacuum Permittivity ϵ 0 = 8.854 10

### 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

### CONDUCTORS + CAPACITORS

CONDUCTORS CAPACITORS Class Activities: Conductors Capacitors (slide 1) Class Activities: Conductors Capacitors (slide 2) Class Activities: Conductors Capacitors (slide 3) 2.30 A point charge q sits outside

### iclicker A metal ball of radius R has a charge q. Charge is changed q -> - 2q. How does it s capacitance changed?

1 iclicker A metal ball of radius R has a charge q. Charge is changed q -> - 2q. How does it s capacitance changed? q A: C->2 C0 B: C-> C0 C: C-> C0/2 D: C->- C0 E: C->-2 C0 2 iclicker A metal ball of

### f n+2 f n = 2 = = 40 H z

Coordinator: Dr.I.M.Nasser Monday, May 18, 2015 Page: 1 Q1. Q2. One end of a stretched string vibrates with a period of 1.5 s. This results in a wave propagating at a speed of 8.0 m/s along the string.

### 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

### Turn in scantron You keep these question sheets

Exam 1 on FEB. 20. 2018 - Physics 106 R. Schad YOUR NAME ¼À Turn in scantron You keep these question sheets 1) Electric flux through a spherical surface of radius 1m dueto a charge inside [which is the

### 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

Chapter 21 Chapter 23 Gauss Law Copyright 23-1 What is Physics? Gauss law relates the electric fields at points on a (closed) Gaussian surface to the net charge enclosed by that surface. Gauss law considers

### A) 4 B) 3 C) 2 D) 5 E) 6

Coordinator: Saleem Rao Monday, January 01, 2018 Page: 1 Q1. A standing wave having three nodes is set up in a string fixed at both ends. If the frequency of the wave is doubled, how many antinodes will

### Lecture 8 Multiple Choice Questions :

Lecture 8 Multiple Choice Questions : 1. A point charge -3Q lies at the centre of a conducting shell of radius 2R. The net charge on the outer surface of the shell is -3Q Zero +1.5 Q d. +3Q 2. Two identical

### 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.

### AP Physics C. Electric Potential and Capacitance. Free Response Problems

AP Physics C Electric Potential and Capacitance Free Response Problems 1. Two stationary point charges + are located on the y-axis at a distance L from the origin, as shown above. A third charge +q is

### Flux. Flux = = va. This is the same as asking What is the flux of water through the rectangle? The answer depends on:

Ch. 22: Gauss s Law Gauss s law is an alternative description of Coulomb s law that allows for an easier method of determining the electric field for situations where the charge distribution contains symmetry.

### 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

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

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

PHY101 Physics Final Term Solved MCQs (Latest) 1 1. A total charge of 6.3 10 8 C is distributed uniformly throughout a 2.7-cm radius sphere. The volume charge density is: A. 3.7 10 7 C/m3 B. 6.9 10 6 C/m3

### NAME Write you name also on the back page of this exam.

7/25/211 Physics 212 Exam-2 NAME Write you name also on the back page of this exam. Use o = 9 x 1 9 N.m 2 /C 2, g = 1 m/s 2 1. The figure shows the cross section of a family of parallel equipotential surfaces

### week 3 chapter 28 - Gauss s Law

week 3 chapter 28 - Gauss s Law Here is the central idea: recall field lines... + + q 2q q (a) (b) (c) q + + q q + +q q/2 + q (d) (e) (f) The number of electric field lines emerging from minus the number

### Capacitor: any two conductors, one with charge +Q, other with charge -Q Potential DIFFERENCE between conductors = V

Physics 2102 Gabriela González Capacitor: any two conductors, one with charge +Q, other with charge -Q Potential DIFFERENCE between conductors = V Units of capacitance: Farad (F) = Coulomb/Volt -Q +Q Uses:

### +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