Power Electronics MCQ Quiz

  1. The typical value of SCR for modern alternator is -
  2. A single phase full bridge inverters can operated in load commutation mode in case load consists of -
  3. Which statement is true for latching current ?
  4. Which semiconductor power device out of the following, is not a current triggering device?
  5. A triac is a -
  6. The minimum duration of the pulse in a pulse triggering system for thyristors should be at -
  7. The triple frequency of a six-phase half wave rectifier for 220 V, 60 Hz input will be -
  8. A diac has ______________ pn junctions.
  9. Between the peak point and the valley point of UJT emitter characteristics we have ___________ region.
  10. What is a TRIAC?
  11. Which one of the following statements is TRUE for an ideal power diode?
  12. For an SCR, dv/dt protection is achieved through
  13. Which one of the following statements is true?
  14. During forward blocking state, a thyristor is associated with -
Power Electronics MCQ

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We have listed below the best Power electronics MCQ Questions that are very helpful for the preparation of the Power Electronics Interview/Exam. This Power Electronics Online  Test contains 25 best multiple-choice questions and answers. You have to choose the right answer to every question. You can also download here the Power Electronics MCQ PDF.

  • RLC underdamped.
  • RLC critically damped.
  • RLC underdamped.
  • RLC overdamped.
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  • It is related to conduction process of device.
  • It is related to turn off process of the device.
  • It is related to turn on process of the device.
  • None of the above
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  • 3 terminal bidirectional switch
  • 3 terminal bilateral switch
  • 2 terminal switch
  • 2 terminal bilateral switch
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  • Two thyristors connected in series mode
  • Two thyristors connected in parallel mode
  • Two thyristors connected in anti parallel mode
  • Two transistors connected in anti parallel mode
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  • Reverse recovery time is non zero and reverse saturation current is zero
  • Forward voltage drop is zero and reverse saturation current is non zero
  • Forward voltage drop is non zero and reverse recovery time is zero
  • Forward voltage drop is zero and reverse recovery time is zero
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  • RC across SCR
  • RL in series with SCR
  • L across SCR
  • L in series with SCR
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  • When avalanche break down takes place, SCRs enter into the conduction state
  • For SCRs to be in blocking state, forward anode current must be lower than the holding current
  • For SCRs to be in conduction state, forward anode current must be greater than the latching current
  • All of the above
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  • large current, low voltage
  • medium current, large voltage
  • low current, large voltage
  • low current, medium voltage
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  • Two gate terminals
  • Single gate terminal
  • Three gate terminals
  • Four gate terminals
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  • Rectifier
  • Inverter
  • Chopper
  • Switch
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  • Thyristor
  • Rectifier
  • Both 1 & 2
  • None of these
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  • two SCR’s in series
  • two SCR’s in parallel opposition
  • three SCR’s in series
  • four SCR’s in series
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  • A set of SCRs
  • PNPN device
  • A set of SCR, diac and a triac
  • None of above
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  • Current Source Inverter
  • Voltage Source Inverter
  • Both Current Source & Voltage Source Inverter
  • None of above
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  • Conduction period
  • Rise of current in SCR
  • Rise of voltage across SCR
  • None of above
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  • To reduce the PRV
  • To restore conduction angle on phase
  • To avoid negative reversal voltage drop
  • None of above
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  • R-L Load
  • Resistive load
  • Back emf load
  • Inductive load
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