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EEE :: Electrostatics

  1. A capacitance of 100 fiF is connected in series with a resistance of 8000 £2. The time constant of the circuit is

  2. A.

     0.2 s

    B.

     0.4 s

    C.

     0.6 s

    D.

     0.8 s

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  3. Electric intensity at any point in an electric field is equal to the at that point.

  4. A.

     electric flux

    B.

     magnetic flux density

    C.

     potential gradient

    D.

     none of the above

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  5. A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is

  6. A.

     100 kV/m

    B.

     10 kV/m

    C.

     5 kV/m

    D.

     2 kV/m

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  7. The dielectric constant (relative permittivity) of glass is given by

  8. A.

     0.1 to 0.4

    B.

     0.5 to 1.0

    C.

     2.0 to 4.0

    D.

     5 to 100

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  9. 1 volt/meter is same as

  10. A.

     1 meter/coulomb

    B.

     1 newton meter

    C.

     1 newton/meter

    D.

     1 joule/coulomb

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  11. When the dielectric is homogeneous,the potential gradient is

  12. A.

     uniform

    B.

     non-uniform

    C.

     zero

    D.

     any of the above

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  13. A field line and an equipotential surface are

  14. A.

     always parallel

    B.

     always at 90°

    C.

     inclined at any angle 0

    D.

     none of the above

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  15. Paper condenser is

  16. A.

     always polarised

    B.

     usually of fixed value

    C.

     electrolytic condenser

    D.

     a variable condenser

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  17. The direction of electric field due +0 positive charge is .

  18. A.

     away from the charge

    B.

     towards the charge

    C.

     both (A) and (B)

    D.

     none of the above

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  19. The capacitance of a capacitor is not affected by

  20. A.

     distance between plates

    B.

     area of plates

    C.

     thickness of plates

    D.

     all of the above

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