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  • Question

  • A two winding transformer is feeding a single phase half wave rectifier circuit. The load is purely resistive. The rms value of transformer secondary current is Is and rms value of load current in Irms. Then


  • Options
  • A. Is = Irms irrespective of the value of firing angle
  • B. Is = 0.5 Irms irrespective of the value of firing angle
  • C. Is = Irms if firing angle is less than 30°
  • D. Is = Irms if firing angle is more than 30°

  • Correct Answer
  • Is = Irms irrespective of the value of firing angle 

    Explanation
    A two winding transformer is feeding a single phase half wave rectifier circuit. The load is purely .

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    • Options
    • A. SCR
    • B. PUT
    • C. SCS
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    • 2. Schrodinger wave equation is partial differential equation.

    • Options
    • A. True
    • B. False
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    • 3. The output frequency of a cycloconverter can be changed by changing the firing angle.

    • Options
    • A. True
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    • C. need 5 V supply
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    • 5. In crystalline solids, atoms are stacked in a regular manner.

    • Options
    • A. True
    • B. False
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    • 6. The classes of solid dielectrics are

    • Options
    • A. A, B, C, D, E, F, H
    • B. A E B F H C D
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    • 7. The unit for mmf is

    • Options
    • A. A
    • B. Wb
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    • 8. In a single phase full wave regulator, the firing angles in the positive and negative half cycles are generally

    • Options
    • A. equal
    • B. different
    • C. equal or different
    • D. different but sometimes equal
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    • 9. The real part of complex dielectric constant and tan? for a dielectric are 2.1 and 5 x 10-4 at 100 Hz respectively. The imaginary part of dielectric constant at 100 Hz is

    • Options
    • A. 1.05 x 10-3
    • B. 2.1 x 10-3
    • C. 5 x 10-3
    • D. 1.05 x 10-2
      • Discuss
    • 10. The units for ?r are

    • Options
    • A. Farads
    • B. Farads/m
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