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A thin spherical conducting shell of rad...

A thin spherical conducting shell of radius R has a charge q. Another charge Q is placed at the centre of the shell. The electrostatic potential at a point P a distance `R/2` from the centre of the shell is

A

`((q+Q))/(4piepsi_(0))(2)/(R)`

B

`(2Q)/(4piepsi_(0)R)`

C

`(2Q)/(4piepsi_(0)R)-(2q)/(4piepsi_(0)R)`

D

`(2Q)/(4piepsi_(0)R)+(q)/(4piepsi_(0)R)`

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