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EEE :: Electrostatics

  1. If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be

  2. A.

     800 uC

    B.

     900 uC

    C.

     1200 uC

    D.

     1600 uC


  3. A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is

  4. A.

     50 joules

    B.

     150 joules

    C.

     200 joules

    D.

     250 joules


  5. Electric displacement is a______quantity.

  6. A.

     scalar

    B.

     vector

    C.

     both of the above

    D.

     none of the above


  7. Dielectric strength of a material depends on

  8. A.

     moisture content

    B.

     temperature

    C.

     thickness

    D.

     all of the above


  9. Dielectric strength of mica is

  10. A.

     10 to 20 kV/mm

    B.

     30 to 50 kV/mm

    C.

     50 to 200 kV/mm

    D.

     300 to 500 kV/mm


  11. If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because

  12. A.

     varying voltage produces the charging and dicharging currents

    B.

     of high peak value

    C.

     charging current can flow

    D.

     discharge current can flow


  13. The relative permittivity has the following units

  14. A.

     F/m

    B.

     m/F

    C.

     Wb/m

    D.

     no units


  15. If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is

  16. A.

     Charged

    B.

     Short-circuited

    C.

     Lossy

    D.

     Satisfactory


  17. The ability of charged bodies to exert force on 6ne another is attributed to the existence of

  18. A.

     electrons

    B.

     protons

    C.

     neutrons

    D.

     electric field


  19. For closer tolerances which of the following capacitors is usually preferred ?

  20. A.

     Paper capacitor

    B.

     Mica capacitor

    C.

     Ceramic disc capacitor

    D.

     None of the above