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Two parallel plates, separated by 2 mm o...

Two parallel plates, separated by 2 mm of air, have a capacitance of `3xx10^(-14)muF` and are charged to a potential of 200 V. then without touching the plates, they are moved apart till the separation is 6 mm. (i) what is the potential differene between the plates ? (ii) what is the change in energy?

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Knowledge Check

  • A pararllel plate capacitor has plates of area A and separation d and is charged to potential diference V . The charging battery is then disconnected and the plates are pulle apart until their separation is 2d . What is the work required to separate the plates?

    A
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    B
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    C
    `3epsilon_(0)AV^(2)//2d`
    D
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  • A parallel plate air condenser of capacity 4muF is charged to a potential of 1000 V. the energy of the condenser is

    A
    1 joule
    B
    4 joule
    C
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    D
    2 joule

  • A condenser having a capacity of 50muF is charged to a potential of 200 V. If the area of each plate of the condenser is 10cm^(2) and the distance between the plates is 0.1 mm. The energy per unit volume of the field between the plates is

    A
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    B
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    D
    `10^(-7)J//m^(3)`

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