Question

Two concentric spherical conducting shells of radii `R` and `2R` carry charges `Q` and `2Q`respectively.Change in electric potential on the outer shell when both are connected by a conducting wire is `(k=(1)/(4 pi varepsilon_(0)))`

Answer 1

When shells are connected, charge on inner shell will be transferred to the outer shell.
`V_(i)=(KQ)/(2R)+(K(2Q))/(2R)=(2KQ)/(2R)`
`V_(f)=(K(3Q))/(2R)impliestriangleV=V_(f)-V_(i)=0`