A conducting sphere of radius $r$ has a charge. Then

  • A

    The charge is uniformly distributed over its surface, if there is an external electric field.

  • B

    Distribution of charge over its surface will be non uniform if no external electric field exist in space.

  • C

    Electric field strength inside the sphere will be equal to zero only when no external electric field exists

  • D

    Potential at every point of the sphere must be same

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