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An air capacitor is given a charge of 2 ...

An air capacitor is given a charge of `2 muC` raising its potential to 200V . If on inserting a dielectric medium, its potential falls to 50V, what is the dielectric constant of the medium ?

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As dielectric constant in terms of potential is given by `K = (V_(0))/(V_(m)) = (200)/(50) = 4`
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