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Variation of G Due to Height and Depth

Question

The depth at which the value of $g$ becomes $25 %$ of that at the surface of the earth. $($ Radius of the earth $=$ 6400km. $)$
4800 km
2400 km
3600 km
1200 km

A

2400 km

B

3600 km

C

4800 km

D

1200 km

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Solution

Verified by Toppr

The value of $g$ at a depth is given by:
$g_{d} = g (1 - \frac{d}{R})$

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