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Electronic Devices and circuits MCQ page-1 Question 1:-


What is the reverse recovery time of a diode when switched from forward bias V_{F} to reverse bias Vr ?

(a) Time taken to remove the stored minority carriers.
(b) Time taken by the diode voltage to attain zero value.
(c) Time to remove stored minority carriers plus the time to bring the diode voltage to reverse bias Vr
(d) Time taken by the diode current to reverse.

Ans: (c) Time to remove stored minority carriers plus the time to bring the diode voltage to reverse bias Vr

Time to remove stored minority carriers plus the time to bring the diode voltage to reverse bias Vr is the reverse recovery time of a diode when switched from forward bias V_{F} to reverse bias Vr.

Electronic Devices and circuits MCQ Question 2:-


Intermediate (I) layer of PIN-diode imparts which one of the following features to a p-n junction diode ?

(a) High reverse blocking capability.
(b) High forward current rating.
(c) Inverting capability.
(d) Poor turn off performance.

Ans: (a) High reverse blocking capability.

Intermediate (I) layer of PIN-diode imparts High reverse blocking capability feature to a p-n junction diode.

Electronic Devices and circuits MCQ Question 3:-


Small recovery time of a diode is most significant for

(a) line-frequency rectification.
(b) switching operations.
(c) high-frequency rectification and switching operations.
(d) low-frequency rectification and switching operations.

Ans: (c) high-frequency rectification and switching operations.

Small recovery time of a diode is most significant for high-frequency rectification and switching operations.

Electronic Devices and circuits MCQ Question 4:-


When a junction diode is used in switching applications, the forward recovery time is

(a) of the order of the reverse time.
(b) negligible in comparison to the reverse recovery time.
(c) greater than the reverse recovery time.
(d) Equal to the mean carrier lifetime t for the excess minority carriers.

Ans: (b) negligible in comparison to the reverse recovery time. ✔

Electronic Devices and circuits MCQ Question 5:-


A PIN diode is frequently used as a

(a) peak clipper.
(b) voltage regulator.
(c) harmonic generator.
(d) switching diode for frequencies up to GHz range.

Ans: (d) switching diode for frequencies up to GHz range. ✔

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