PHYS 2002 Chapter : PHYS2002 Practice Final Exam 1

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15 Mar 2019

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Name:________________________: bubble in your version of the exam. 10 q: in the figure, point a is a distance l away from a point charge q. What is the ratio of the electric field at b to that at a, eb/e: 1/3, 1/9, 1/16, 1/4, this cannot be determined since neither the value of q nor the length l is specified. r. +q: two point charges (-q and +q) are located on a line and separated by a distance r. The capacitor is filled with neoprene rubber ( = 6. 4). When a 6. 0-v potential difference exists across the plates of the capacitor, the capacitor stores 4. 0 c of charge. A: an electron moving left to right at 100 m/s enters a region of space (shaded) where a uniform magnetic field exists into the page with a value of 150 t. which of the curves,

Related Questions

4 point charges each the samemagnetude with varying signs are arranged at the corners of asquare. Which of the arrows labeled A, B, C, D, gives the correctdirection of the net force that acts on the charge at the upperright corner?

A, B, C, D, the net force on the charge is 0

Three charged particles are arranged on the corners of a square as shown in the figure with charge -Q on both the particles at the upper left corner and the particle at the lower right corner and with charge +2Q on the particle at the left corner. What is the direction of the electric field at the upper right corner which is a point in empty space?

(a) It is upward and to the right.

(b) It is straight to the right.

(d) It is downwards and to the left.

(e) It is perpendicular to the plane of the picture and outward.

sangriallama884

1.Two uncharged, conducting spheres, A and B, are held at rest oninsulating stands and are in contact. A positively charged rod isbrought near sphere A. While the rod is in place, the two spheresare separated. How will the spheres be charged, if at all, afterthey are separated?
Sphere A Sphere B
(a) positive positive
(b) positive negative
(c) negative positive
(d) negative negative
(e) zero zero

2. A charged conductor is brought near an uncharged insulator.Which one of the following statements is true?
(a) Both objects will repel each other.
(b) Both objects will attract each other.
(c) Neither object exerts an electrical force on the other.
(d) The objects will repel each other only if the conductor has anegative charge.
(e) The objects will attract each other only if the conductor has apositive charge.

3. An electron is moved from point A, where the electric potentialis VA = â240 V, to point B, where the electric potential is VB =â360 V. What is the change in the electric
potential energy?
(a) 1.92Ã10â17 J (b) 2.04Ã10â17 J (c) 5.75Ã10â17 J (d) 8.98Ã10â17 J(e) 1.05Ã10â16 J

4. A -2q charge is located a distance d to the right of a +4qcharge, along the x
axis. At which point (or points) along the axis does the electricfield go to zero? To
solve this problem, consider an observer at point P, which is anarbitrary distance x from the +4q charge. Find the value (orvalues) for x (in terms of the separation distance d) where thetotal electric field vanishes.
(a) The electric field is never zero in the vicinity of thesecharges.
(b) The electric field is zero at x = -0.328d.
(c) The electric field is zero at x = +4.22d.
(d) The electric field is zero at both x = -2.26d and x =+2.26d.
(e) The electric field is zero at x = +3.41d.

5. point A is a distance L away from a point charge Q. Point B is adistance 4L away from Q. What is the ratio of the electrostaticpotential at B to that at A, i.e., what is VB/VA?
(a) 1/16
(b) 1/9
(c) 1/4
(d) 1/3
(e) can not be determined without specifying Q and L

6. Which one of the following statements best explains why it ispossible to define an electric potential
in a region of space that contains an electric field?
(a) Work must be done to bring two positive charges closertogether.
(b) Like charges repel one another and unlike charges attract oneanother.
(c) A positive charge will gain kinetic energy as it approaches anegative charge.
(d) The work required to bring two charges together is independentof the path taken.
(e) A negative charge will gain kinetic energy as it moves awayfrom another negative charge.

PHYS 2002 Chapter : PHYS2002 Practice Final Exam 1

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