If a conductor is in electrostatic equilibrium near an electrical charge:
a. the total charge on the conductor must be zero.
b. the electric field inside the conductor must be zero.
c. any charges on the conductor must be uniformly distributed.
d. the sum of all forces between the conductor and the charge must be zero.
[Ques. 2] If the radiant energy from the Sun comes in as a plane EM wave of intensity 1 340 W/m2, calculate the peak values of E and B. (0 = 4 107 Tm/A, c = 3.00108 m/s)
a. 330 V/m, 3.00 104 T
b. 1 010 V/m, 3.35 106 T
c. 330 V/m, 3.35 106 T
d. 1 010 V/m, 3.00 104 T
[Ques. 3] At what point is the charge per unit area greatest on the surface of an irregularly shaped conducting solid?
a. where surface curves inward
b. where surface is flat
c. where curvature is least
d. where curvature is greatest
[Ques. 4] The Earth is 1.49 1011 m from the Sun. If the solar radiation at the top of the Earth's atmosphere is 1 340 W/m2, what is the total power output of the Sun?
a. 7.48 1027 W
b. 2.34 1030 W
c. 6.62 1026 W
d. 3.74 1026 W
[Ques. 5] The electric field associated with a uniformly charged hollow metallic sphere is the greatest at:
a. the center of the sphere.
b. the sphere's inner surface.
c. infinity.
d. the sphere's outer surface.
[Ques. 6] Determine the amount of energy carried in 2.0 m of a 4.6-mW He-Ne laser beam if the cross-sectional area of the beam is 4.1 106 m2.
a. 1.4E10 J
b. 4.9E12 J
c. 3.1E11 J
d. 6.1E8 J
e. 1.0E11 J
[Ques. 7] The electric field at the surface of a positively charged conductor has a direction characterized by which of the following?
a. tangent to the surface
b. perpendicular inward toward the charge
c. at a 45 angle to the surface
d. perpendicular outward and away from the charge
[Ques. 8] What is the maximum value of the electric field E at 1.5 m from a 102-W light bulb radiating in all directions? (0 = 4 107 Tm/A, c = 3.00 108 m/s)
a. 5.2E+1 V/m
b. 4.1E+3 V/m
c. 2.7E+3 V/m
d. 8.5E+2 V/m
e. 3.2E+2 V/m
[Ques. 9] Relative distribution of charge density on the surface of a conducting solid depends on the
a. shape of the conductor.
b. mass density of the conductor.
c. type of metal of which the conductor is made.
d. strength of the earth's gravitational field.
[Ques. 10] A radio wave transmits 1.59 W/m2 average power per unit area. What is the peak value of the associated magnetic field? (0 = 4 107 Tm/A and c = 3.00 108 m/s)
a. 1.33E14 T
b. 3.46E+1 T
c. 1.15E7 T
d. 7.28E5 T
e. 8.16E8 T
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