1000+ Power Electronics MCQ Questions and Answers Pdf - 1
Question: 1
BCT is used for
(A) Low power phase control
(B) low power current control
(C) high power current control
(D) high power phase control
Ans: D
high power phase control
Question: 2
Thyristor is a semiconductor switch which is
(A) bistable and astable
(B) unilateral and astable
(C) bilateral and bistable
(D) unilateral and bistable
Ans: D
unilateral and bistable
Question: 3
SCRs are used in series to meet
(A) high voltage demand
(B) low current demand
(C) low voltage demand
(D) high current demand
Ans: A
high voltage demand
Question: 4
Resonant converters are basically used to
(A) convert a square wave into a sine wave
(B) generate large peaky voltage
(C) eliminates harmonics
(D) reduce the switching losses
Ans: D
reduce the switching losses
Question: 5
The input frequency of a cycloconverter is more than the output frequency because
(A) the number of switching device is large compared to that in a cascade converter pair
(B) the cycloconverter employs natural commutation is the SCRs and more number of supply voltage cycles are needed to form one cycle of the output voltage
(C) the cycloconverter is normally used for high voltage and high current applications
(D) there is no intermediate dc link
Ans: D
there is no intermediate dc link
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