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A point charge q is placed at a distance...

A point charge q is placed at a distance r from a very long charged thread of unoform linear charge density `lambda`. Find out total electric force experienced by the line charge due to the point charge. (Neglect gravity).

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Force on charge q due to the thread, `F=((2K lambda)/r).q` By Newton's So, force on the thread `=(2Klambda)/r .q` (away from point charge)
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