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Two small equal balls of radius r carry ...

Two small equal balls of radius r carry chrges `q_(1)` and `q_(2)` they are joined by a thin wire while being kept at a fixed distacne l/ Calaulate the heat produced in the connecting wire. Why is the wire fine?

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The correct Answer is:
`(q_(1)-q_(2))^(2)/(16piepsi_(0))((1)/(r)-(1)/(l))`
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