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EEE :: Electrostatics

  1. The electric field at a point situated at a distance d from straight charged conductor is

  2. A.

     proportional to d

    B.

     inversely proportional to d

    C.

     inversely proportional to d

    D.

     none of the above

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  3. capacitors are used for audio frequency and radio frequency coupling and tuning.

  4. A.

     Air

    B.

     Mica

    C.

     Plastic film

    D.

     Ceramic

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  5. at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point.

  6. A.

     Electric intensity

    B.

     Magnetic flux density

    C.

     Electric flux

    D.

     None of the above

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  7. When a dielectric is placed in an electric field the field strength

  8. A.

     decreases

    B.

     increases

    C.

     reduces to zero

    D.

     remain unchanged

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  9. The force between two charges is 120 N. If the distance between the charges is doubled, the force will be

  10. A.

     60 N

    B.

     30 N

    C.

     40 N

    D.

     15 N

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  11. Which of the following materials has the highest value of dielectric constant?

  12. A.

     Glass

    B.

     Vacuum

    C.

     Ceramics

    D.

     Oil

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  13. at a point is equal to the negative potential gradient at that point.

  14. A.

     Electric intensity

    B.

     Electric flux

    C.

     Magnetic flux

    D.

     Magnetic flux density

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  15. The sparking between two electrical contacts can be reduced by inserting a

  16. A.

     capacitor in parallel with contacts

    B.

     capacitor in series with each contact

    C.

     resistance in line

    D.

     none of the above

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  17. The units of volume charge density are

  18. A.

     Coulomb/meter

    B.

     Coulomb/meter

    C.

     Coulomb/meter

    D.

     Coulomb/meter

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  19. What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ?

  20. A.

     It will become magnetic

    B.

     It will melt

    C.

     It will get punctured or cracked

    D.

     Its molecular structure will get changed

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