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Two concentric shells of masses $M_{1}$ and $M_{2}$ are having radii $r_{1}$ and $r_{2}$ $(r_{2} > r_{1})$ . Which of the following is the correct expression for the gravitational field on a mass m?

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F= GM1+M2r2, for r

F =GM1+M2r2, for r

F =GM2r2, for r1

F =GM1r2, for r1

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detailed solution

Correct option is D

when r is in between r1and r2 field will be only due to M1not due to M2as it is within M2

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Two concentric shells of masses M1and M2are having radii r1and r2r2>r1 . Which of the following is the correct expression for the gravitational field on a mass m?

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Two concentric shells of masses $M_{1}$ and $M_{2}$ are having radii $r_{1}$ and $r_{2}$ $(r_{2} > r_{1})$ . Which of the following is the correct expression for the gravitational field on a mass m?