Exercise: Special Purpose Diodes

Questions for: Special Purpose Diodes

The forward voltage across an LED is typically 0.7 V.
A:
True
B:
False
C:
D:
Answer: B
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A varactor is a pn junction diode that always operates in ________-bias and is doped to ________ the inherent capacitance of the depletion region.
A:
forward, maximize
B:
reverse, maximize
C:
reverse, minimize
D:
forward, minimize
Answer: B
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A laser diode normally emits
A:
coherent light.
B:
monochromatic light.
C:
coherent and monochromatic light.
D:
neither coherent nor monochromatic light.
Answer: C
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What type of diode is commonly used in electronic tuners in TVs?
A:
varactor
B:
Schottky
C:
LED
D:
Gunn
Answer: A
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A tunnel diode is used
A:
in high-power circuits.
B:
in circuits requiring negative resistance.
C:
in very fast-switching circuits.
D:
in power supply rectifiers.
Answer: B
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