A series of 3 uncharged concentric shells surround a small central charge q. The charge distributed on the outside of the third shell is
a. 3q.
b. (ln 3)q.
c. +q.
d. +(ln 3)q.
e. +3q.
[Ques. 2] A series of n uncharged concentric shells surround a small central charge q. The charge distributed on the outside of the nth shell is
a. nq.
b. (ln n)q.
c. +q.
d. +(ln n)q.
e. +nq.
[Ques. 3] Which statement is always correct when applied to a charge distribution located in a finite region of space?
a. Electric potential is always zero at infinity.
b. Electric potential is always zero at the origin.
c. Electric potential is always zero at a boundary surface to a charge distribution.
d. Electric potential is always infinite at a boundary surface to a charge distribution.
e. The location where electric potential is zero may be chosen arbitrarily.
[Ques. 4] The electric potential inside a charged solid spherical conductor in equilibrium
a. is always zero.
b. is constant and equal to its value at the surface.
c. decreases from its value at the surface to a value of zero at the center.
d. increases from its value at the surface to a value at the center that is a multiple of the potential at the surface.
e. is equal to the charge passing through the surface per unit time divided by the resistance.
[Ques. 5] When a negative charge is released and moves along an electric field line, it moves to a position of
a. lower potential and lower potential energy.
b. lower potential and higher potential energy.
c. higher potential and lower potential energy.
d. higher potential and higher potential energy.
e. decreasing magnitude of the electric field.
[Ques. 6] When a positive charge is released and moves along an electric field line, it moves to a position of
a. lower potential and lower potential energy.
b. lower potential and higher potential energy.
c. higher potential and lower potential energy.
d. higher potential and higher potential energy.
e. greater magnitude of the electric field.
[Ques. 7] When a charged particle is moved along an electric field line,
a. the electric field does no work on the charge.
b. the electrical potential energy of the charge does not change.
c. the electrical potential energy of the charge undergoes the maximum change in magnitude.
d. the voltage changes, but there is no change in electrical potential energy.
e. the electrical potential energy undergoes the maximum change, but there is no change in voltage.
[Ques. 8] Equipotentials are lines along which
a. the electric field is constant in magnitude and direction.
b. the electric charge is constant in magnitude and direction.
c. maximum work against electrical forces is required to move a charge at constant speed.
d. a charge may be moved at constant speed without work against electrical forces.
e. charges move by themselves.
[Ques. 9] The electric field in a region of space is given by Ex = (3.0x) N/C, Ey = Ez = 0, where x is in m. Points A and B are on the x axis at xA = 3.0 m and xB = 5.0 m. Determine the potential difference VB VA.
a. 24 V
b. +24 V
c. 18 V
d. +30 V
e. 6.0 V
[Ques. 10] Two flat conductors are placed with their inner faces separated by 6.0 mm. If the surface charge density on one of the inner faces is 40 pC/m2, what is the magnitude of the electric potential differences between the two conductors?
a. 36 mV
b. 18 mV
c. 32 mV
d. 27 mV
e. 14 mV
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