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Q.

Two charges when kept at a distance of 1m apart in vacuum have some force of repulsion. If the force of repulsion between these two charges be same, when placed in an oil of dielectric constant 4, the distance of separation is

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a

0.25m

b

0.4m

c

0.5m

d

0.6m

answer is C.

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Detailed Solution

$t^{1} = \frac{t}{\sqrt{k}}$

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