The force of attraction between two char...

The force of attraction between two charges `+30 xx 10^(-9)C and -20 xx 10^(-9)C` seperated by a distance of 020m is found to be `5 xx 10^(-5)N. Find the relative permittivity of the medium.

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NN GHOSH-ELECTRIC FIELD AND POTENIAL-EXERCISE

The force of attraction between two charges +30 xx 10^(-9)C and -20 xx...
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