Electronics - Diodes and Applications

Exercise :: Diodes and Applications - General Questions

11. 

Since diodes are destroyed by excessive current, circuits must have:

A. higher voltage sources
B. current limiting resistors
C. more dopants
D. higher current sources

Answer: Option B

Explanation:

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12. 

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: Option A

Explanation:

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13. 

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: Option A

Explanation:

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14. 

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: Option C

Explanation:

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15. 

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: Option C

Explanation:

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