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EEE :: Electrostatics

  1. In a cable capacitor, voltage gradient is maximum at the surface of the

  2. A.

     earth

    B.

     conduction

    C.

     sheath

    D.

     insulator


  3. Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them

  4. A.

     all in series

    B.

     all in parallel

    C.

     two in parallel and third in series with this combination

    D.

     two in series and third in parallel across this combination


  5. Capacitance increases with

  6. A.

     increase in plate area and decrease in distance between the plates

    B.

     increase in plate area and distance between the plates

    C.

     decrease in plate area and value of applied voltage

    D.

     reduction in plate area and distance between the plates


  7. If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will

  8. A.

     decrease

    B.

     increase

    C.

     remains unchanged

    D.

     become zero


  9. Mica capacitors are characterised by all of the following except

  10. A.

     stable operation

    B.

     accurate value

    C.

     low leakage reactance

    D.

     low losses


  11. Which of the following capacitors will have the least variation?

  12. A.

     Paper capacitor

    B.

     Ceramic capacitor

    C.

     Silver plated mica capacitor

    D.

     None of the above


  13. capacitors are used in transistor circuits.

  14. A.

     Ceramic

    B.

     Paper

    C.

     Air

    D.

     Electrolytic


  15. The number of Faraday tubes of flux passing through a surface in an electric field is called

  16. A.

     electric flux

    B.

     electric flux density

    C.

     magnetic flux density

    D.

     electric charge density


  17. The value of E within the field due to a point charge can be found with the help of

  18. A.

     Faraday’s laws

    B.

     Kirchhoff's laws

    C.

     Coulomb’s laws

    D.

     none of the above


  19. Dielectric strength of a medium is usually expressed in

  20. A.

     J/mm

    B.

     C/m²

    C.

     kV/mm

    D.

     N/mm