Earthly Charges.

Three identical metallic plates A,B and C are initially given charges Q , 4 Q , 2 Q Q,4Q,2Q respectively. If the plates A and C are connected by a conducting wire and plate B is earthed then how much charge flows from earth to plate B.

Earth is assumed to be at zero potential.

Details and Assumptions :

  • Take Q = 1 C Q = 1 C


The answer is 7.

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