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Question

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 :


  1. 0.4m
  2. 0.5m
  3. 0.25m
  4. 0.6m

A
0.25m
B
0.6m
C
0.4m
D
0.5m
Solution
Verified by Toppr

In vacuum force of repulsion =14πε0q1q2(1)2
given the force of repulsion is same in oil so let the distance in oil be X.
14πε0q1q2(1)2=14πKε0q1q2X2

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