Two concentric metallic spherical shells are given equal amount of positive charges. Then,

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the outer sphere is always at a higher potential

Both the spheres are at the same-potential

the inner sphere is always at a higher potential

no prediction can be made about their potentials unless the actual value of charges and radii are known

answer is B.

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Detailed Solution

Potential difference $= V_{i} - V_{o} \equiv \frac{q}{4 {πε}_{0}} (\frac{1}{r_{i}} - \frac{1}{r_{0}})$

If q is positive, $V_{i} - V_{0} = positive or V_{i} > V_{o} .$

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