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Two concentric, thin metallic spheres of...

Two concentric, thin metallic spheres of radii `R_(1)` and `R_(2)` `(R_(1) gt R_(2))` bear charges `Q_(1)` and `Q_(2)` respectively. Then the potential at distance r between `R_(1)` and `R_(2) will be

A

`K((Q_(1)+Q^(2))/r)`

B

`K(Q_(1)/r+Q^(1)/R^(2))`

C

`K(Q_(2)/r+Q^(1)/R^(1))`

D

`K(Q_(1)/R^(1)+Q^(2)/R^(2))`

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