A positive point charge $Q$ is brought near an isolated metal cube. Then :

the cube becomes negatively charged

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the cube becomes positively charged

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the interior becomes positively charged and the surface becomes negatively charged

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the interior remains charge free and the surface gets nonuniform charge distribution

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Solution

The correct option is D the interior remains charge free and the surface gets nonuniform charge distribution
The metal cube is a conductor. The charge inside the conductor is zero. So the interior remains charge free. As it is isolated metal so when positive charge is brought near it , surface charge will become non-uniform.

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(c) The interior becomes positively charged and the surface becomes negatively charged.
(d) The interior remains charge free and the surface gets non-uniform charge distribution.

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A positive point charge Q is brought near an isolated metal cube. Then :

A positive point charge $Q$ is brought near an isolated metal cube. Then :