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  4. A capacitance of a parallel plate air capacitor is 10 μ F. Dielectric constant of the medium to be introduced in between its plates to double its capacitance is

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Q. A capacitance of a parallel plate air capacitor is $10 \mu F$. Dielectric constant of the medium to be introduced in between its plates to double its capacitance is

KEAMKEAM 2020

Solution:

$\frac{C_{m}}{C_{a}}=K=\frac{20 \mu F}{10 \mu F}=2$