force between two point charges kept at a distance d apart in air is F. if these charges are kept at the same distance in water, how does the force between them change? if a brass rod is placed between these two charges, how does the force change?
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Due to magnetic field
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When the rods are kept in water at the same distance, the electric force is calculate using the formula
Electric force = Force between the two charges in air
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Dielectric constant of water
The dielectric constant of water is 80.
Hence, the electric force when the rods are inserted in water is F/80 where F is the force between the two charges in air.
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