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Updated on : 2022-09-05

Solution

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Correct option is B)

$Step 2 - Net gravitational potential at point P is given by$

$V_{p}=(Potential due to sphere)+(Potential due to particle)$

As we know that Gravitational potential due to point mass$=rGM $

Gravitational potential inside shell $=aGM $

$∵V_{p}=aGM +2a GM $

$⇒V_{p}=a3GM $

Hence option (B) is correct.

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