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Charging by Induction

Two point cha...

Question

Two point charges separated by a distance d repel each other with a force of 9N. If the separation between them becomes 3d, the force of repulsion will be?

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Solution

$F o r c e F = \frac{1}{4 π ε_{0}} \frac{q q}{r^{2}} F_{1} = 9 N F_{2} = F_{1} / 9 = 1 N$

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