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A large solid sphere of diameter d attra...

A large solid sphere of diameter d attracts a small particle with a force F. If the central portion of the sphere of diameter `(d)/(2)` be removed leaving behind a cavity, then the new force of attraction becomes

A

`(9F)/(8)`

B

`(7F)/(8)`

C

`(3F)/(2)`

D

`(3F)/(4)`

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The correct Answer is:
B
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