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Q.

A charge Q is to be divided on two small spheres separated by a distance R. The maximum possible electrostatic force between the spheres can be :

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a

$\frac{{KQ}^{2}}{2 R^{2}}$

b

$\frac{{KQ}^{2}}{4 R^{2}}$

c

$\frac{{KQ}^{2}}{R^{2}}$

d

$\frac{2 {KQ}^{2}}{R^{2}}$

answer is B.

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Detailed Solution

$F_{\max} when \frac{Q}{2} each .$

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