The capacitance of a parallel plate capacitor with air as medium is $6\, \mu F$. With the introduction of a dielectric medium, the capacitance becomes $30\, \mu F$. The permittivity of the medium is..........$C ^{2} N ^{-1} m ^{-2}$
$\left(\varepsilon_{0}=8.85 \times 10^{-12} C ^{2} N ^{-1} m ^{-2}\right)$
NEET 2020, Easy
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$C_{m}=\epsilon_{r} C_{0}$
$\epsilon_{r}=\frac{30}{6}=5$
$\epsilon=\epsilon_{0} \cdot \epsilon_{r}=8.85 \times 10^{-12} \times 5$
$e=0.44 \times 10^{-10}$
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