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