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CGP EDU Academic Team
Published on: September 12, 2026
A parallel plate capacitor has a capacity C. The separation between the plates is doubled and a dielectric medium is introduced between the plates. If the capacity now becomes 2C, the dielectric constant of the medium is
Text Solution
Verified by ExpertsThe correct answer is:
C
$C_1 = \varepsilon_0 \frac{A}{d_1}$ and $C_2 = K \varepsilon_0 \frac{A}{d_2}$
∴ ∴ $\frac{C_1}{C_2} = \frac{1}{K} \times \frac{d_2}{d_1}$ $= \frac{c}{2c} = \frac{1}{K} \times \frac{2d}{d}$ ⇒ ⇒ K = 4
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