OnlineCBT
Physics · PYQ NEET UG 2020
हिन्दीThe capacitance of a parallel plate capacitor with air as medium is \( 6\ \mu\text{F} \). With the introduction of a dielectric medium, the capacitance becomes \( 30\ \mu\text{F} \). The permittivity of the medium is: (\( \varepsilon_0 = 8.85 \times 10^{-12}\text{ C}^2\text{N}^{-1}\text{m}^{-2} \))
Correct answer · Option 2
\( 0.44 \times 10^{-10}\text{ C}^2\text{N}^{-1}\text{m}^{-2} \)
Explanation
Dielectric constant \( K = \frac{C}{C_0} = \frac{30}{6} = 5 \). Permittivity \( \varepsilon = K\varepsilon_0 = 5 \times 8.85 \times 10^{-12} = 44.25 \times 10^{-12} = 0.44 \times 10^{-10}\text{ C}^2\text{N}^{-1}\text{m}^{-2} \).
