ElectrostaticsMedium

Question

Two point charges placed at a distance r in air exert a force F on each other. The value of distance R at which they experience force 4F when placed in a medium of dielectric constant K = 16 is :

Options

A.r
B.r/4
C.r/8
D.2r

Solution

Initially, F =               ..............(1)
Finally, 4F =              ..............(2)
⇒                  or      R =

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