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It is experimentally observed that if an insulator is used as medium in place of air or vacuum, the force between the electric charges is reduced by a factor "Er".

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13y ago
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11y ago

As air is replaced by some other medium with relative permittivity epsilon r, then force between the charges will be reduced by epsilon r. If F is the original force then new force will be F/ epsilon r

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Q: What is the effect of mediam in coulombs law?
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