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EEE :: Electrostatics

  1. Which capacitor will be physically smaller for the same ratings ?

  2. A.

     Ceramic capacitor

    B.

     Paper capacitor

    C.

     Both will be of equal size

    D.

     None of the above


  3. The value of dielectric constant for vacuum is taken as

  4. A.

     zero

    B.

     1

    C.

     4

    D.

     10


  5. The ohmmeter reading for a short circuited capacitor is

  6. A.

     infinity

    B.

     few kilo ohms

    C.

     few megohms

    D.

     zero


  7. For which of the following parameter variation, the capacitance of the capacitor remains unaffected ?

  8. A.

     Distance between plates

    B.

     Area of the plates

    C.

     Nature of dielectric

    D.

     Thickness of the plates


  9. The capacitor preferred for high frequency circuits is

  10. A.

     air capacitor

    B.

     mica capacitor

    C.

     electrolytic capacitor

    D.

     none of the above


  11. A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is

  12. A.

     62 x 105 V/m

    B.

     72 x 105 V/m

    C.

     82 x 105 V/m

    D.

     92 x 105 V/m


  13. An uncharged conductor is placed near a charged conductor, then

  14. A.

     the uncharged conductor gets charged by conduction

    B.

     the uncharged conductor gets charged by induction and then attracted towards the charging body

    C.

     the uncharged conductor is attracted first and then charged by induction

    D.

     it remains as such


  15. Which of the following expression is correct for electric field strength ?

  16. A.

     E = D/E

    B.

     E = D2/t

    C.

     E = jtD

    D.

     E= nD2


  17. A dielectric material must be

  18. A.

     resistor

    B.

     insulator

    C.

     good conductor

    D.

     semi conductor


  19. The property of a capacitor to store electricity is called its

  20. A.

     capacitance

    B.

     charge

    C.

     energy

    D.

     none of the above