Author Question: An advantage in evaluating surface integrals related to Gauss's law for symmetric charge ... (Read 89 times)

EY67 · **on:** Jul 29, 2018

An advantage in evaluating surface integrals related to Gauss's law for symmetric charge distributions is

A)

the flux is outward.
B)

the flux is inward.
C)

the electric field is of constant magnitude on certain surfaces.
D)

the charge is always on the surface.
E)

the electric field is a constant on any surface.

Question 2

At room temperature (295 K with kT 0.025 eV), what fraction of the free electrons in a semiconductor with an energy gap of 1.5 eV can be expected to be in the conduction band?

A)

10-9
B)

10-13
C)

10-30
D)

0.03
E)

10-15