Solve & explain briefly:

Q. Two conducting spheres, each given a charge q are kept far apart as shown. The amount of charge that crosses the switch S, when it is closed, is (the connection between the spheres is conducting. 



1   q 3                                       2   2 q 3 3   3 q 4                                   4   Z e r o

Dear student,Let x charge flow from smaller sphere to another.As both sphere are connected by wire so there potential will be same.So,k(q-x)R=k(q+x)2Rx=q3Regards

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