1.

There are two concentric spherical shells of ratii r and 2r. Intially a charge Q is given to the inner shell. Now switch S_(1)is closed and S_(2) is opned and the process is repeated n times for both the keys altermatively. Find the final potential between the shells.

Answer»

`(1)/(4^(n+1))[(Q)/(2piepsilon_(0)r)]`
`(1)/(2^(n+1))[(Q)/(4piepsilon_(0)r)]`
`(1)/(2^(n+1))[(Q)/(2piepsilon)]`
`(1)/(2^(n+1))[(Q)/(piepsilon_(0)r)]`

Answer :B


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