1000+ Power Electronics Quiz Questions and Answers Pdf - 1

Question: 1

Which of the following is used in heat sink?

(A) aluminium

(B) carbon

(C) iron

(D) silver

Question: 2

The speed of a dc motor can be controlled by using

(A) transistors

(B) thyristors

(C) diodes

(D) either diodes or thyristors

Question: 3

Thyristor is not made using germanium because

(A) group V elements cannot be doped with it

(B) its current handling capacity is less than silicon

(C) it is a stable semiconductor

(D) it has high leakage current

Question: 4

Dynamic equalizing circuit is used for

(A) equal division of current through each thyristor in series

(B) equal division of voltage across each thyristor in parallel

(C) equal division of voltage across each thyristor in parallel

(D) equal division of voltage across each thyristor

Question: 5

SMPC are superior to linear power suppliers in respect of

(A) efficiency and regulation

(B) noise and cost

(C) size and efficiency

(D) regulation and noise