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  • Question

  • A two branch parallel circuit has a 20 ? resistance and 1 H inductance in one branch and a 100 ?F capacitor in the second branch. It is fed from 100 V ac supply, at resonance, the input impedance of the circuit is


  • Options
  • A. 500 ?
  • B. 50 ?
  • C. 20 ?
  • D. 5 ?

  • Correct Answer
  • 500 ? 

    Explanation
    At parallel resonance circuit impedance = A two branch parallel circuit has a 20 ? resistance and 1 H inductance in one branch and a 100 ?F ca.

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    • Options
    • A. SCR
    • B. PUT
    • C. SCS
    • D. Shockley diode
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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
    • B. False
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    • 4. Most of the memory chips in static RAM

    • Options
    • A. do not require any supply
    • B. need 2 V supply
    • C. need 5 V supply
    • D. need 12 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
    • C. Y A E B F H C
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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
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    • C. equal or different
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      • Discuss
    • 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
    • C.
    • D. no units
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