Exercise: Semiconductors

Questions for: Semiconductors

You have an unknown type of diode in a circuit. You measure the voltage across it and find it to be 0.3 V. The diode might be
A:
a silicon diode.
B:
a germanium diode.
C:
a forward-biased silicon diode.
D:
a reverse-biased germanium diode.
Answer: B
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The boundary between p-type material and n-type material is called
A:
a diode.
B:
a reverse-biased diode.
C:
a pn junction.
D:
a forward-biased diode.
Answer: C
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Effectively, how many valence electrons are there in each atom within a silicon crystal?
A:
2
B:
4
C:
8
D:
16
Answer: C
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Which statement best describes an insulator?
A:
A material with many free electrons.
B:
A material doped to have some free electrons.
C:
A material with few free electrons.
D:
No description fits.
Answer: C
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For a forward-biased diode, as temperature is ________, the forward current ________ for a given value of forward voltage.
A:
decreased, increases
B:
increased, increases
C:
increased, decreases
D:
decreased, decreases
Answer: B
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