Question: Q. 20. Two parallel plate capacitors of capacitances $C_{1}$ and $C_{2}$ such that $C_{1}=2 C_{2}$ are connected across a battery of $V$ volts as shown in the figure. Initially the key ( $\kappa$, is kept closed to fully charge the capacitors. The key is now thrown open and a dielectric slab of dielectric constant ’ $\kappa$ ’ is inserted in the two capacitors to completely fill the gap between the plates. Find the ratio of (i) the net capacitance and (ii) the energies stored in the combination, before and after the introduction of the dielectric slab.
A [Comptt. Delhi I, II, III 2014]
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Solution:
Ans. Try yourself, Similar to Q. 13 Short Answer Type II
