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Two point charges placed at a certain di...

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 constnat K is given by

A

`r`

B

`r/k`

C

`(r)/(sqrt(k))`

D

`rsqrt(k)`

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The correct Answer is:
C
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