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EEE :: Electrostatics

  1. For making a capacitor, it is better to select a dielectric having

  2. A.

     low permittivity

    B.

     high permittivity

    C.

     permittivity same as that of air

    D.

     permittivity slightly more than that of air

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  3. The power dissipated in a pure capacitor is

  4. A.

     zero

    B.

     proportional to applied voltage

    C.

     proportional to value of capacitance

    D.

     both (B) and (C) above

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  5. When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will

  6. A.

     remain uncharged

    B.

     decrease

    C.

     increase

    D.

     become zero

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  7. Which of the following capacitors will have the least value of breakdown voltage ?

  8. A.

     Mica

    B.

     Paper

    C.

     Ceramic

    D.

     Electrolytic

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  9. A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be

  10. A.

     10 F

    B.

     10 uF

    C.

     100 nF

    D.

     1000 uF

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  11. In a capacitor the electric charge is stored in

  12. A.

     metal plates

    B.

     dielectric

    C.

     both (A) and (B)

    D.

     none of the above

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  13. The capacitance C is charged through a resistance R. The time constant of the charging circuit is given by

  14. A.

     CIR

    B.

     1/RC

    C.

     RC

    D.

     RIC

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  15. A region around a stationary electric charge has

  16. A.

     An electric field

    B.

     A magnetic field

    C.

     Both (A) and (B)

    D.

     None of the above

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  17. A gang condenser is a

  18. A.

     polarised capacitor

    B.

     variable capacitor

    C.

     ceramic capacitor

    D.

     none of the above

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  19. Paper capacitors usually have a tolerance of

  20. A.

     ± 5%

    B.

     ± 10%

    C.

     ± 15%

    D.

     ± 20%

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