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

A cube of a metal is given a positive charge $Q$. For this system, which of the following statements is true?
  1. Electric potential at the surface of the cube is zero
  2. Electric potential within the cube is zero
  3. Electric field is normal to the surface of the cube
  4. Electric field varies within the cube

Solution

Surface of metallic cube is an equipotential surface. Therefore, electric field is normal to the surface of the cube. ~

Asked in: JEE Mains - Electrostatics - Test 3

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