A uniform spherical shell of mass m and radius R has a particle of mass m placed at its centre. The gravitational potential at a distance R/2 from the centre is

Q: A uniform spherical shell of mass m and radius R has a particle of mass m placed at its centre. The gravitational potential at a distance R/2 from the centre is

(a) – 2GM/R

(b) – GM/R

(c) – 4GM/R

(d) – 3GM/R

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Ans: (d)