Physics - Electrostatics Question with Solution | TestHub

Two conducting spherical shell of radii $R\&2R$ given charges $Q$ and $2Q$ respectively. Inner shell is provided with a switch which can ground the inner shell, as shown. Switch is initially open and energy stored in the system is $U_1$. After the switch is closed, energy stored in the system is found to be $U_2$. Find $\frac{U_1}{U_2}$.