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A capacitor becomes a perfect insulator ...

A capacitor becomes a perfect insulator for

A

Alternatinc currents

B

Direct current

C

Both `AC` and `DC`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`X_(C)=1/(omegaC)=1/(2pivC) , for DC v=0, :. X_(C)=oo`
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Knowledge Check

  • A capacitor becomes a perfect insulator is

    A
    alternating current
    B
    direct current
    C
    both a and b
    D
    none of above

  • In insulators,

    A
    the valence band is partially filled with electrons.
    B
    the conduction band is partially filled with electrons.
    C
    the conduction band is filled with electrons and valence band is empty.
    D
    the conduction band is empty and the valence band is filled with electrons.

  • By which smallest number should 5808 be multiplied so that it becomes a perfect square ?

    A
    2
    B
    7
    C
    11
    D
    3

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    By which smallest number should 5808 be multiplied so that it becomes a perfect square?

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