Two condensers of capacity `C` and `2C` are connected in parallel and these are charged upto `V` volt. If the battery is removed and dielectric medium of constant `K` is put between the plates of first condenser, then the potential at each condenser is.

Options

A. `(V)/(k+2)`
B. `2+(k)/(3V)`
C. `(2V)/(k+2)`
D. `(3V)/(k+2)`

Answer

D

Explanation

Q = constant, `CV + 2CV = KCV^(1) + 2CV^(1)`