ElectrostaticsHard
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 = 
..............(1)Finally, 4F =
..............(2)⇒
or R = Create a free account to view solution
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