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Electrostatic Potential And Capacitance

Question
CBSEENPH12037396

Suggest an arrangement of three point charges separated by finite distances that has zero electric potential energy.

Solution
The arrangement of three point -q,+q and +q charges such that electrical potential energy is 0, is as shown below :
                   

Electric potential energy, U = kq(q)r+k(q) (-q)(2r)+k(-q) (q)(2r)                                               U = zero.

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