Exercise: Electronic Devices And Circuits

Questions for: Electronic Devices And Circuits

In a solar cell, the photovoltaic voltages is the voltage at which the resultant current is
A:
positive
B:
zero
C:
negative
D:
rated current
Answer: B
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Gold is often diffused into silicon P-N junction devices to
A:
increase recombination rate
B:
reduce recombination rate
C:
make silicon a direct gap semiconductor
D:
make silicon semimetal
Answer: B
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The circuit shown in the figure is best described as a
A:
bridge rectifier
B:
ring modulator
C:
frequency discriminator
D:
voltage doubler
Answer: D
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Magnetic recording tape is most commonly made from
A:
small particles of iron
B:
silicon iron
C:
ferric-oxide
D:
silver nitrate
Answer: C
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An electrically neutral semiconductor has
A:
no free charges
B:
no majority carriers
C:
no minority carriers
D:
equal number of positive and negative charges
Answer: D
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