Exercise: Diodes And Applications

Questions for: Diodes And Applications

Electrons in the outermost orbit or shell of an atom are called
A:
free electrons
B:
negative ions
C:
valence electrons
D:
conduction band electrons
Answer: C
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The peak inverse voltage (PIV) across a nonconducting diode in a bridge rectifier equals approximately:
A:
half the peak secondary voltage
B:
twice the peak secondary voltage
C:
the peak value of the secondary voltage
D:
four times the peak value of the secondary voltage
Answer: C
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Testing a good diode with an ohmmeter should indicate
A:
high resistance when forward or reverse biased
B:
low resistance when forward or reverse biased
C:
high resistance when reverse biased and low resistance when forward biased
D:
high resistance when forward biased and low resistance when reverse biased
Answer: C
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A filtered full-wave rectifier voltage has a smaller ripple than does a half-wave rectifier voltage for the same load resistance and capacitor values because:
A:
there is a shorter time between peaks
B:
there is a longer time between peaks
C:
the larger the ripple, the better the filtering action
D:
none of the above
Answer: A
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A diode for which you can change the reverse bias, and thus vary the capacitance is called a
A:
varactor diode
B:
tunnel diode
C:
zener diode
D:
switching diode
Answer: A
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