Exercise: Electronic Devices And Circuits

Questions for: Electronic Devices And Circuits

If an additional two diodes were used to connect the 1 kW load across a bridge rectifier circuits, utilizing the full secondary of the transformer, how much d.c. power could be delivered using a transformer with the rating of 105 VA?
A:
35 W
B:
60 W
C:
85 W
D:
100 W
Answer: C
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When a semi-conductor is doped, its electrical conductivity
A:
increases
B:
decreases in the direct ratio of the doped material
C:
decreases in the inverse ratio of the doped material
D:
remains unaltered
Answer: A
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Higher value of ripple factor indicates
A:
poor rectification
B:
ideal rectification
C:
r.m.s. value to peak value
D:
none of the above
Answer: A
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The range of visible light is
A:
300 to 2000 Å
B:
200 - 4000 Å
C:
4000 to 7700 Å
D:
more than 10000 Å
Answer: C
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The conductivity of germanium increases by about 6 percent per degree increase in temperature.
A:
True
B:
False
C:
D:
Answer: A
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