A cube of a metal is given a positive ch...

A cube of a metal is given a positive charge `Q`. For the above system, which of the following statements is true ?

Potential at the surface of cube is zero

Potential within the cube is zero

Electric field is normal to the surface of the cube

Electric field varies within the cube

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The correct Answer is:

For any metallic surface, electric field lines are `bot^(r)` to the surface.

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