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  • Question

  • In the basic series inverter circuit, the source current has


  • Options
  • A. low harmonic content
  • B. high harmonic content
  • C. low or high harmonic content depending on firing angle
  • D. zero harmonic content

  • Correct Answer
  • high harmonic content 

    • Power Electronics problems

    Search Results

    • 1. Thyristors connected in series need static and dynamic stabilizing circuits.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. A single phase half wave rectifier is feeding a resistive load. As firing angle is increased

    • Options
    • A. dc output voltage and rms output voltage decrease in the same proportion
    • B. dc output voltage and rms output voltage decrease
    • C. dc output voltage and rms output voltage increase
    • D. dc output voltage and rms output voltage increase in the same proportion
      • Discuss
    • 3. In auxiliary commutated chopper fed by voltage V and having L and C commutating elements, the peak value of capacitor current is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 4. A chopper is a high efficiency circuit.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. In rectifier circuits, ripple factor RF and form factor FF are related as

    • Options
    • A. RF = (FF2 - 1)0.5
    • B. RF = FF
    • C. RF = FF - 1
    • D. RF = (FF - 1)0.5
      • Discuss
    • 6. Assertion (A): Chopper always requires forced commutation

      Reason (R): Morgan chopper uses a saturable reactor.


    • 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
    • 7. Which of these devices have four layers?

    • Options
    • A. UJT
    • B. SCR
    • C. TRIAC
    • D. SCR and TRIAC
      • Discuss
    • 8. A single phase half wave converter is feeding-a resistor load. The input voltage is v = Vm sin ?t. If firing angle is zero, the output dc voltage Vdc and output rms voltage Vrms respectively

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 9. A capacitor C farads is charged to a voltage V. It discharges through a thyristor, a diode and an inductance L. The peak current in the circuit is

    • Options
    • A. VCL
    • B.
    • C.
    • D.
      • Discuss
    • 10. A single phase converter is fed by a source having an inductance L. If load current is I0, the decrease in output voltage due to overlap is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss

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