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EEE :: Electrostatics

  1. If three 15 uF capacitors are connected in series, the net capacitance is

  2. A.

     5 uF

    B.

     30 uF

    C.

     45 uF

    D.

     50 uF

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  3. If three 10 uF capacitors are connected in parallel, the net cararitance is

  4. A.

     20 uF

    B.

     30 uE

    C.

     40 uF

    D.

     50 uF

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  5. capacitors can be used only for D.C.

  6. A.

     Air

    B.

     Paper

    C.

     Mica

    D.

     Electrolytic

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  7. Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the

  8. A.

     Voltage across the plates increases

    B.

     Voltage across the plates decreases

    C.

     Charge on the capacitor decreases

    D.

     Charge on the capacitor increases

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  9. The presence of an uncharged conductor near a charged one increases the

  10. A.

     charge of the charged conductor

    B.

     capacity of the charged conductor

    C.

     potential of the charged conductor

    D.

     all of the above

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  11. The absolute permittivity of free space is given by

  12. A.

     8.854 x 1(T9 F/m)

    B.

     8.854 x 1(T10 F/m)

    C.

     8.854 x KT11 F/m

    D.

     8.854 x 10?12 F/m

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  13. The relative permittivity of free space is given by

  14. A.

     1

    B.

     10

    C.

     100

    D.

     1000

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  15. Electric field intensity is a quantity

  16. A.

     scalar

    B.

     vector

    C.

     both (A) and (B)

    D.

     none of the above

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  17. The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to ______ percent of its value.

  18. A.

     37, initial

    B.

     62, initial

    C.

     62, final

    D.

     37, final

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  19. The potential gradient across the material of low permittivity is than across the material of high permittivity.

  20. A.

     smaller

    B.

     greater

    C.

     both (A) and (B)

    D.

     none of the above

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