Q. ‘Gravimeter’ is an instrument used to detect

A
Water deposits tinder earth
B
Oil deposits under water
C
Minerals under earth
D
None of these
Solution:

Gravimeter. Gravimeter, also called gravity meter, sensitive device for measuring variations in the Earth’s gravitational field, useful in prospecting for oil and minerals. In one form, it consists of a weight suspended from a spring; variations in gravity cause variations in the extension of the spring.

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