Section 29.1
Conduction in Solids
Practice Test
1.
What happens to atomic energy levels when many atoms are brought together?
a.
They split into broad bands with forbidden gaps.
b.
They disappear completely.
c.
They join into one energy level.
d.
They vibrate.
Hint
2.
What happens to conductors as the temperature rises?
a.
nothing
b.
The resistance is reduced.
c.
The conductivity increases.
d.
The conductivity is reduced.
Hint
3.
A
p
-type semiconductor conducts electricity with __________.
a.
holes
b.
neutrons
c.
protons
d.
electrons
Hint
4.
The energy gap between the valence band and the conduction band in a semiconductor is __________.
a.
1 V or less
b.
1 eV or less
c.
greater than 1 eV
d.
exactly 1 eV
Hint
5.
An
n
-type semiconductor conducts electricity with __________.
a.
holes
b.
neutrons
c.
electrons
d.
protons
Hint
6.
Why are dopants added to intrisinc semiconductor materials?
a.
to increase the forbidden gap
b.
to increase resistance
c.
to make semiconductors electrically neutral
d.
to increase conductivity
Hint
7.
In Figure 29-3, what should be the overall direction of the electron drift?
a.
down
b.
left
c.
right
d.
up
Hint
