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Standard XII

Physics

Charges on Conductors

A conductor A...

Question

A conductor A with a cavity as shown in the figure is given a charge $Q$ . Find net charge appear on the inner surface of the cavity.

+ Q

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- Q

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- Q / 2

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Zero

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Solution

The correct option is D Zero
Since A is a conductor, $E$ inside it must be .
Take a Gaussian surface enclosing the cavity but not the entire conductor.
Thus,
$E = \frac{q}{ϵ_{o}}$ Where $q$ is charge on the inner surface.
But $E = 0$ Thus $q = 0$

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A conductor A with a cavity as shown in the figure is given a charge Q. Find net charge appear on the inner surface of the cavity.

The correct option is D ZeroSince A is a conductor, E inside it must be .Take a Gaussian surface enclosing the cavity but not the entire conductor.Thus,E=qϵo Where q is charge on the inner surface.But E=0 Thus q=0

A conductor A with a cavity as shown in the figure is given a charge $Q$ . Find net charge appear on the inner surface of the cavity.

The correct option is D Zero
Since A is a conductor, $E$ inside it must be .
Take a Gaussian surface enclosing the cavity but not the entire conductor.
Thus,
$E = \frac{q}{ϵ_{o}}$ Where $q$ is charge on the inner surface.
But $E = 0$ Thus $q = 0$