Power Semiconductor Device and Integrated Circuits MCQ Questions Pdf - 1

Question: 1

Which one of the following devices is not used as the controller in a stabilizer?


(B) Triac

(C) Diac

(D) Power transistor

Ans: C

Diac (Diode for Alternating Current)

Question: 2

A UJT has

(A) Low firing current

(B) Use as a waveform generator

(C) Stable negative resistance characteristics

(D) All of these characteristics

Ans: C

Stable negative resistance characteristics

Question: 3

A modern power semiconductor device that combines the characteristics of BJT and MOSFET is





Ans: A


Question: 4

The triac is equivalent to

(A) One diode, one SCR connected in antiparallel

(B) One SCR, one diode connected in parallel

(C) Two SCRs connected in parallel

(D) Two SCRs connected in antiparallel

Ans: D

Two SCRs connected in antiparallel

Question: 5

In switching diode fabrication, a dopant is introduced into silicon which introduces additional trap levels in the material thereby reducing the mean life time of carriers. This dopant is

(A) Aluminium

(B) Platinum

(C) Copper

(D) Gold

Ans: D


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