PhysicsMedium56×since 2002Q6176The energy stored in the electric field produced by a metal sphere is 4.5 J. If the sphere contains 4 μ\muμC charge, its radius will be : [ Take : 14 π∈0={1 \over {4\,\pi { \in _0}}} =4π∈01= 9 ×\times× 10⁹ N −-− m²/C² ]A20 mmB32 mmC28 mmD16 mmCheck answerSkip