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The change in the value of g at a height...

The change in the value of `g` at a height `h` above the surface of the earth is the same as at a depth d below the surface of earth. When both `d` and `h` are much smaller than the radius of earth, then which one of the following is correct?

A

x=h

B

x=2h

C

`x=h//2`

D

`x=h^(2)`

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The correct Answer is:
B
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