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A point charge 4 is situated at a distan...

A point charge 4 is situated at a distance r on axis from one end of a thin conducting rod of length L having a charge Q (Uniformly distributed along its length). "The magnitude of electric force between the two is ________.

A

`(KQq)/(r^(2))`

B

`(2KQ)/(r(r+L))`

C

`(KQq)/(r(r-L))`

D

`(KQq)/(r(r+L))`

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