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The change in gravitational force experi...

The change in gravitational force experienced by a particle of mass m, due to a uniform thin circular ring when moving the particle from centre of ring by a distance x `x < < R` (Radius of ring) along the straight line perpendicular to the plane of the ring is proportional to

A

x

B

`x^2`

C

`1/x^3`

D

`1/x`

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