Q 12-02-017NEETNEET 2020Top questionEasy
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 : ($\epsilon_0 = 8.85 \times 10^{-12}\ \text{C}^2\text{N}^{-1}\text{m}^{-2}$)
Answer: (C) $0.44 \times 10^{-10}\ \text{C}^2\text{N}^{-1}\text{m}^{-2}$
Dielectric constant: $K = \dfrac{30}{6} = 5$.
$$\epsilon = K\epsilon_0 = 5 \times 8.85 \times 10^{-12} = 44.25 \times 10^{-12} \approx 0.44 \times 10^{-10}\ \text{C}^2\text{N}^{-1}\text{m}^{-2}$$
Solution by Sreeraj P, M.Sc Physics