Power Electronics MCQs | Page - 3

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 • 100.69K Points
Coach

Q. An RC snubber network used in BJT

  • (A) Divert the collector current during turn - off
  • (B) Improves the reverse bias safe operating area
  • (C) Dissipates a fair amount of switching power
  • (D) All of these
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Mr. Dubey • 100.69K Points
Coach

Q. In a 3 phase half wave rectifier, when firing angle is less than 90 degree, then the average dc output voltage becomes

  • (A) Positive
  • (B) Negative
  • (C) Zero
  • (D) None of these
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M

Mr. Dubey • 100.69K Points
Coach

Q. In dual converters,

  • (A) Both rectifiers provides positive current to the load
  • (B) Both rectifiers provide negative current to the load
  • (C) One rectifiers provide positive current to the load and the other negative current
  • (D) One rectifier provide positive current to the source and the other negative
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M

Mr. Dubey • 100.69K Points
Coach

Q. A single phase ac - dc converter is also known as

  • (A) rectifier
  • (B) inverter
  • (C) chopper
  • (D) regulator
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M

Mr. Dubey • 100.69K Points
Coach

Q. Anode of an operational SCR is

  • (A) Always positive w.r.t cathode
  • (B) Always negative w.r.t anode
  • (C) Always positive w.r.t anode
  • (D) Always negative w.r.t cathode
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M

Mr. Dubey • 100.69K Points
Coach

Q. If the gate voltage of an SCR is removed, then the

  • (A) anode current decreases
  • (B) anode current does not decrease at all
  • (C) anode current increases
  • (D) cathode current increases
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M

Mr. Dubey • 100.69K Points
Coach

Q. In a single phase full wave rectifier, during blocking state the peak inverse voltage of diode is

  • (A) V m
  • (B) 2 V m
  • (C) V m / 2
  • (D) 4 V m
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Mr. Dubey • 100.69K Points
Coach

Q. In a full wave rectifier, the rectification ratio is approximately equal to

  • (A) 61%
  • (B) 71%
  • (C) 81%
  • (D) 91%
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Mr. Dubey • 100.69K Points
Coach

Q. For power output higher than 15 kW, the suitable rectifier is

  • (A) Single phase
  • (B) 3 phase
  • (C) Poly phase
  • (D) Only (b) and (c)
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M

Mr. Dubey • 100.69K Points
Coach

Q. The sum of all phase current in a star connected primary winding with no neutral connection is equal to

  • (A) Phase current
  • (B) Three times the phase current
  • (C) Three times the line current
  • (D) Zero at all times
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