1.

12. A uniform sphere of mass M and radius R issurrounded by a concentric spherical shell of samemass but radius 2R. A point mass m is kept at adistance x (R) in the region bounded by spheresas shown in the figure. The net gravitational forceon the particle is2RGMmx(2) R3GMmG(M +m)(3)X(4) Zero

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option (a)

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