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Q.

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 R2 from the centre of the shell is

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a

(q+Q)24πε0R

b

2Q4πε0R

c

2Q4πε0R-2q4πε0R

d

2Q4πε0R+q4πε0R

answer is D.

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Detailed Solution

Electric potential at P,V=k·QR/2+k·qR =2Q4πε0R+q4πε0R
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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 R2 from the centre of the shell is