How much work is required to separate the two charges infinitely away from each other?
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Answer:
The electric potential energy of two point charges q1 and q2 , separated by a distance r is, U(r)=q1q24πϵ0r U ( r ) = q 1 q 2 4 π ϵ 0 r . Work done on the system to change its potential energy from U1 to U2 is given by, Wext=U2−U1 W e x t = U 2 − U 1 .
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Explanation:
0….for the obvious reasons…thay are already separated…mathematically proofing..they are infinitely away from each other hence zero force between them, and if force is zero..work is zero.
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