Exercise: Electronic Devices And Circuits

Questions for: Electronic Devices And Circuits

Which of the following semi-conductor has forbidden energy gap less 1 eV?
A:
Sulphur
B:
Phosphorous
C:
Germanium
D:
Carbon
Answer: C
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The ripple factor for a bridge rectifier is
A:
0.406
B:
1.21
C:
1.11
D:
2.22
Answer: B
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In intrinsic semiconductor the increase in conductivity per degree increase in temperature is about
A:
2%
B:
6%
C:
15%
D:
25%
Answer: B
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The voltage at which Avalanche occurs is known as
A:
cut in voltage
B:
barrier voltage
C:
breakdown voltage
D:
depletion voltage
Answer: C
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The resistivity of a semiconductor
A:
increases as the temperature increases
B:
decreases as the temperature increases
C:
remains constant even when temperature varies
D:
none of the above
Answer: B
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