Diodes and Applications - General Questions (5)

Directions to Solve

Diodes and Applications - General Questions

33.

What is the current through the diode?

mcq11_1009_1

A.	1 mA
B.	0.975 mA
C.	0.942 mA
D.	0.0 mA

Answer: Option A

Explanation:

No answer description available for this question

34.

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:

No answer description available for this question

35.

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:

No answer description available for this question

36.

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:

No answer description available for this question

37.

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:

No answer description available for this question

38.

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:

No answer description available for this question

39.

The characteristic curve for the complex model of a silicon diode shows that

A.	the barrier potential is 0 V
B.	the barrier potential stays fixed at 0.7 V
C.	the barrier potential increases slightly with an increase in current
D.	the barrier potential decreases slightly with an increase in current

Answer: Option C

Explanation:

No answer description available for this question.

40.

What is the current through the LED?

mcq11_1013_1u

A.	0 mA
B.	23 mA
C.	18 mA
D.	13 mA

Answer: Option D

Explanation:

No answer description available for this question.

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