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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.

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Mr. Dubey • 51.43K Points
Coach

Q. 131) In a 3 phase full converter, the instantaneous output voltage can have negative part if

(A) firing angle is less than 60°
(B) firing angle is less than 90°
(C) firing angle is more than 60°
(D) firing angle is more than 90°
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Mr. Dubey • 51.43K Points
Coach

Q. 132) The circuit in figure is for

(A) resonant commutation
(B) line commutation
(C) auxiliary commutation
(D) complementary commutation
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Mr. Dubey • 51.43K Points
Coach

Q. 133) The main utility of SCR is due to

(A) gate triggering
(B) high temperature triggering
(C) triggering
(D) high breakdown voltage
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Mr. Dubey • 51.43K Points
Coach

Q. 134) he circuit in figure is for

(A) resonant commutation
(B) self commutation
(C) load commutation
(D) auxiliary commutation
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Mr. Dubey • 51.43K Points
Coach

Q. 135) A single phase half bridge inverter required to feed R-L loads needs

(A) 2 thyristors
(B) 4 thyristors
(C) 2 thyristors and two diodes
(D) 4 thyristors and 4 diodes
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Mr. Dubey • 51.43K Points
Coach

Q. 136) In a single phase semi-converter the number of thyristors is

(A) 16
(B) 8
(C) 4
(D) 2
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Mr. Dubey • 51.43K Points
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Q. 137) Which of these commutation methods uses two leads?

(A) Class A
(B) Class B
(C) Class C
(D) Class D
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Mr. Dubey • 51.43K Points
Coach

Q. 138) The difference between resonant commutation and self commutation is

(A) both these methods are based on entirely different principles
(B) in resonant commutation, the commutating elements carry load current but in self commutation, the commutating elements do not carry load current
(C) resonant commutation uses L and C but self commutation uses only capacitor
(D) none of the above
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Mr. Dubey • 51.43K Points
Coach

Q. 139) In a series inverter

(A) the commutating elements carry full load current
(B) the commutating elements carry upto 50% of load current
(C) the commutating elements do not carry load current
(D) any of the above
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Mr. Dubey • 51.43K Points
Coach

Q. 140) Which of these devices is used in relaxation oscillator?

(A) UJT
(B) SCR
(C) DIAC
(D) TRIAC
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