For charges q1 and q2, if force between them for some separation in air is F, then force between them in a medium of permitivity will be?

Dear Student ,
When a new medium is introduced between the charges q1 and q2 , then the electrostatic force will be ,
F=14πε0εrq1q2r2Here , permittivity of the medium,ε=ε0εrεr=εε0

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F' = F/K, where K is the permittivity of the medium
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