Power Electronics MCQs with answers Page - 9

Here, you will find a collection of MCQ questions on Power Electronics. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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A

Admin • 828.03K Points
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Q. A thyristor is reverse biased. A positive gate pulse is applied. The thyristor

  • (A) will be turned on
  • (B) may or may not turn on
  • (C) will not turn on
  • (D) will turn on after sometime

A

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Q. A single phase series converter is used for

  • (A) high voltage output
  • (B) high current output
  • (C) high voltage and high current output
  • (D) improving the circuit efficiency

A

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Q. A single phase half wave controlled rectifier circuit has an R-L load. A freewheeling diode is also in the circuit. When freewheeling diode is conducting the SCR

  • (A) is forward biased
  • (B) is reverse biased
  • (C) may be forward biased or reverse biased
  • (D) forward biased initially but reverse biased afterwards

A

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Q. An SBS can conduct is one direction only.

  • (A) True
  • (B) False
  • (C) none
  • (D) all

A

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Q. The number of doped regions in a SCR is

  • (A) 2
  • (B) 3
  • (C) 4
  • (D) 5

A

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Q. All inverters use forced commutation.

  • (A) True
  • (B) False
  • (C) none
  • (D) all

A

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Q. In 180° mode of operation of a 3 phase bridge inverter, two thyristors conduct at one time.

  • (A) True
  • (B) False
  • (C) none
  • (D) all

A

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Q. A reactor is used in a dual converter operating in non-circulating current mode.

  • (A) True
  • (B) False
  • (C) none
  • (D) all

A

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Q. Which of these commutation methods uses an auxiliary SCR?

  • (A) Class A
  • (B) Class B
  • (C) Class C
  • (D) Class D

A

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Q. A thyristor needs protection against

  • (A) high
  • (B) high
  • (C) both high and high
  • (D) either high or high

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