Two point charges placed at a certain distance r in air exert a force – McqOptions

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1.	Two point charges placed at a certain distance r in air exert a force F on each other. Then the distance r' at which these charges will exert the same force in a medium of dielectric constant k is given by [EAMCET 1990; MP PMT 2001]
A.	r
B.	r/k
C.	\[r/\sqrt{k}\]
D.	\[r\sqrt{k}\]
Answer» D. \[r\sqrt{k}\]

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