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Dear candidates you will find MCQ questions of Power Electronics here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

M

Mr. Dubey • 51.43K Points
Coach

Q. 51) A chopper is a

(A) Time ratio controller
(B) AC to DC converter
(C) DC transformer
(D) High speed semiconductor switch
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Mr. Dubey • 51.43K Points
Coach

Q. 52) What is the duty cycle of a chopper ?

(A) Ton/Toff
(B) Ton/T
(C) T/Ton
(D) Toff x Ton
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M

Mr. Dubey • 51.43K Points
Coach

Q. 53) The load voltage of a chopper can be controlled by varying the

(A) duty cycle
(B) firing angle
(C) reactor position
(D) extinction angle
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Mr. Dubey • 51.43K Points
Coach

Q. 54) The values of duty cycle (α) lies between

(A) 0<α<1
(B) 0>α>-1
(C) 0<=α<=1
(D) 1<α<100
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M

Mr. Dubey • 51.43K Points
Coach

Q. 55) If T is the time period for a chopper circuit and α is its duty cycle, then the chopping frequency is

(A) Ton/α
(B) Toff/α
(C) α/Toff
(D) α/Ton
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Mr. Dubey • 51.43K Points
Coach

Q. 56) AC voltage controllers convert

(A) Fixed ac to fixed dc
(B) Variable ac to variable dc
(C) Fixed ac to variable ac
(D) Variable ac to fixed ac
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Mr. Dubey • 51.43K Points
Coach

Q. 57) In AC voltage controllers the

(A) variable ac with fixed frequency is obtained
(B) variable ac with variable frequency is obtained
(C) variable dc with fixed frequency is obtained
(D) variable dc with variable frequency is obtained
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Mr. Dubey • 51.43K Points
Coach

Q. 58) The GTO (gate turn-off thyristor) is a

(A) p-n-p-n device
(B) p-n-p device
(C) p-metal-n device
(D) p-n single junction device
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Mr. Dubey • 51.43K Points
Coach

Q. 59) The GTO can be turned off

(A) by a positive gate pulse
(B) by a negative gate pulse
(C) by a negative anode-cathode voltage
(D) by removing the gate pulse
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Mr. Dubey • 51.43K Points
Coach

Q. 60) In GTO The anode current is ideally limited by the

(A) gate pulse amplitude
(B) internal impedance of the device
(C) load Impedance
(D) gate circuit impedance
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