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EEE :: Electrostatics

  1. The inverse of capacitance is called

  2. A.

     reluctance

    B.

     conductance

    C.

     susceptance

    D.

     elastance

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  3. A capacitor consists of

  4. A.

     two insulators separated by a conductor

    B.

     two conductors separated by an insulator

    C.

     two insulators only

    D.

     two conductors only

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  5. The breakdown voltage for paper capacitors is usually

  6. A.

     20 to 60 volts

    B.

     200 to 1600 volts

    C.

     2000 to 3000 volts

    D.

     more than 10000 volts

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  7. Which of the following capacitors is marked for polarity ?

  8. A.

     Air

    B.

     Paper

    C.

     Mica

    D.

     Electrolytic

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  9. Which of the following capacitors can be used for temperature compensation ?

  10. A.

     Air capacitor

    B.

     Ceramic capacitor

    C.

     Paper capacitor

    D.

     None of the above

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  11. To prevent the generation of static charges on rubber or flat leather

  12. A.

     surface is moistened

    B.

     conductive dressing is done

    C.

     oil compound dressing is done

    D.

     talcum powder is sprayed on the surface

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  13. A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be

  14. A.

     5 times smaller than before

    B.

     5 times greater than before

    C.

     10 times greater than before

    D.

     25 times larger than before

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  15. A condenser suitable for D.C. only is

  16. A.

     Metallic plate variable gang condenser

    B.

     Metallic paper capacitor

    C.

     Oil impregnated paper condenser

    D.

     Poled aluminium electrolytic condenser

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  17. The dissipation factor of a good dielectric is of the order of

  18. A.

     0.0002

    B.

     0.002

    C.

     0.02

    D.

     0.2

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  19. Dielectric strength of medium

  20. A.

     increases with rise in temperature

    B.

     increases with moisture content

    C.

     is same for all insulating materials

    D.

     none of the above

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