Question:
Two capacitors of capacities 2C and C are joined in parallel and charged up to potential V. The battery is removed and the capacitor of capacity C is filled completely with a medium of dielectric constant K. The potential difference across the capacitors will now be :
Correct Option: , 3
Solution:
$V_{C}=\frac{2 C V+C V}{K C+2 C}$
$=\frac{3 V}{K+2}$