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  • Question

  • Mc Murray full bridge inverter uses


  • Options
  • A. 4 thyristors and 2 diodes
  • B. 4 thyristors and 4 diodes
  • C. 8 thyristors and 4 diodes
  • D. 8 thyristors and 8 diodes

  • Correct Answer
  • 8 thyristors and 4 diodes 

    • Power Electronics problems

    Search Results

    • 1. Which of these devices can conduct in both directions?

    • Options
    • A. SCR
    • B. SUS
    • C. SBS
    • D. UJT
      • Discuss
    • 2. The efficiency of a chopper circuit is about

    • Options
    • A. 80% or more
    • B. around 50%
    • C. around 20%
    • D. around 5%
      • Discuss
    • 3. A fully controlled bridge converter is feeding an RLE load. For some circuit conditions firing angle is 47°. If connections of battery are reversed, the firing angle is likely to be

    • Options
    • A. 47°
    • B. less than 47°
    • C. more than 47°
    • D. either more or less than 47°
      • Discuss
    • 4. Assertion (A): A half wave controlled rectifier has poorer efficiency and higher ripple factor than a full wave controlled rectifier.

      Reason (R): The use of a freewheeling diode in half wave controlled rectifier circuit improves the waveform of load current and circuit power factor.


    • Options
    • A. Both A and R are correct and R is correct explanation of A
    • B. Both A and R correct but R is not correct explanation of A
    • C. A is correct but R is wrong
    • D. A is wrong but R is correct
      • Discuss
    • 5. The main utility of SCR is due to

    • Options
    • A. gate triggering
    • B. high temperature triggering
    • C. triggering
    • D. high breakdown voltage
      • Discuss
    • 6. If 0.5 T is the time period of oscillations and Toff is the time between turn off of one thyristor and turn on of second thyristor, the frequency of output f of a series inverter is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 7. In rectifier circuits, the rms value of ac component of output voltage is equal to

    • Options
    • A. Vrms
    • B. 0.5 Vrms
    • C. (Vrms - Vdc)0.5
    • D. (Vrms2 - Vdc2)0.5
      • Discuss
    • 8. Half bridge and full bridge inverters of one type use different commutation methods.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. In a three phase to single phase full wave bridge cycloconverter, the number of thyristors is

    • Options
    • A. 36
    • B. 18
    • C. 12
    • D. 8
      • Discuss
    • 10. Two thyristors of the same rating and specifications

    • Options
    • A. will have equal on state voltage drops
    • B. will have equal forward blocking voltage for the same current
    • C. will have different on state voltage drops
    • D. may have equal or different on state voltage drops and equal or different forward blocking voltage's for the same current
      • Discuss

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