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Standard XII

Physics

Electrostatic Shielding

The figure sh...

Question

The figure shows a charge q placed inside a cavity in an uncharged conductor. Now if an external electric field is switched on:

Only induced charge on outer surface will redistribute

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Only induced charge on inner surface will redistribute.

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Both induced charge on outer and inner surface will redistribute.

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Force on charge q placed inside the cavity will change.

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Solution

The correct option is A
Only induced charge on outer surface will redistribute

External electric fields cannot penetrate a closed conductor because of electrostatic shielding. Hence they cannot affect any charges in the interior.

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The figure shows a charge q placed inside a cavity in an uncharged conductor. Now if an external electric field is switched on:

The correct option is A Only induced charge on outer surface will redistributeExternal electric fields cannot penetrate a closed conductor because of electrostatic shielding. Hence they cannot affect any charges in the interior.

The correct option is A
Only induced charge on outer surface will redistribute

External electric fields cannot penetrate a closed conductor because of electrostatic shielding. Hence they cannot affect any charges in the interior.