Two identical isolated metal spheres, A and B

PHYSICS · Single correct · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

Two identical isolated metal spheres, A and B, are initially separated by a large distance. Sphere A carries a charge of +6 nC+6\,\text{nC}; the initial charge on sphere B is unknown. The two spheres are temporarily connected with a conducting wire and then separated, after which each sphere has a charge of +2 nC+2\,\text{nC}. What was the initial charge on sphere B? (a) 0 nC0\,\text{nC} (b) −4 nC-4\,\text{nC} (c) −2 nC-2\,\text{nC} (d) +2 nC+2\,\text{nC}

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