A capacitor is connected to a $10\,V$ battery. The charge on the plates is $10\,\mu C$ when medium between plates is air. The charge on the plates become $100\,\mu C$ when space between plates is filled with oil. The dielectric constant of oil is
Medium
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$Q = CV\,\,\,\, Q' = KCV$
$\boxed{K = 10}$
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