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Two insulated charged copper spheres A and B of identical size have charges qA and –3qA respectively.

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Two insulated charged copper spheres A and B of identical size have charges qA and –3qA respectively. When they are brought in contact with each other and then separated, what are the new charges on them?

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Charge on each  = \(\cfrac{{q_A}-3{q_A}}2=-q_A\)

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