Assertion :In moving from centre of a solid sphere to its surface, gravitational potential increase . Reason: Gravitational field strength increases.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
potential at center $V_{c} = - \frac{3 G M}{2 R}$

potential at surface $V_{s} = - \frac{G M}{R}$

Hence potential decreases when we move from center to surface of earth.

Gravitational field strength is zero at center of sphere and $E = \frac{G M}{R^{2}}$ at surface of sphere.

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