There are two concentric spherical shells of radii r and 2r. Initially, a charge Q is given to the inner shell. Initially both S1 and S2 are open. Now, switch S1 is closed keeping S2 opened and after a moment S2 is closed and S1 is opened and this process is repeated n times for both the keys alternatively. Find the final potential difference between the shells.

There are two concentric spherical shells of radii r and 2r. Initially

1.	There are two concentric spherical shells of radii r and 2r. Initially, a charge Q is given to the inner shell. Initially both S1 and S2 are open. Now, switch S1 is closed keeping S2 opened and after a moment S2 is closed and S1 is opened and this process is repeated n times for both the keys alternatively. Find the final potential difference between the shells.
Answer» There are two concentric spherical shells of radii $r$ and $2 r$ . Initially, a charge $Q$ is given to the inner shell. Initially both $S_{1}$ and $S_{2}$ are open. Now, switch $S_{1}$ is closed keeping $S_{2}$ opened and after a moment $S_{2}$ is closed and $S_{1}$ is opened and this process is repeated $n$ times for both the keys alternatively. Find the final potential difference between the shells.

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