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The electrostatic force between two char...

The electrostatic force between two charges distance r apart in vacuum is F, The force between the same charges distance r/2 apart in a medium of dielectric constant 2 is

A

F/2

B

2F

C

F/4

D

4F

Text Solution

Verified by Experts

` because F = (1)/(4pi epsi_0 ) . (q xx q)/(r^2)`
In dielectric medium ,
`F. = (1)/(4 pi epsi_0 k) (q xx q)/( (r//2)^2)`
` = (1)/(4 pi epsi_0 xx 2) xx (q xx q)/( r^2) xx 4`
` F. = 2F`
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