1. Gauss S Law Is Generally Written

PHYS 3342

Answers to Quiz 2

1. Gauss’s Law is generally written

a) How should the integral in Gauss’s law be evaluated (over what region)?

b) To what does qencl refer?

a) Over a closed surface

Not around the perimeter of a closed loop

Not over the surface bounded by a closed loop

b) The net charge inside the closed surface

2. An uncharged conductor has a hollow cavity inside of it. Within this cavity there is a charge of +10 mC that does not touch the conductor. There are no other charges in the vicinity. What can you say about the charges on the inner and outer surfaces of the conductor?

+10 mC on the outer surface of the conductor and -10 mC on the inner surface

3. A point charge of magnitude +7.96 mC is at the center of a cube with sides of length 0.630 m. What is the electric flux through each of the six faces of the cube?

Because of symmetry, the amount of flux through each of the six sides of the cube is the same. Total flux through the sides of the cube is equal to total flux through a sphere entirely inside the cube. Therefore: