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Coupling

The restoring...

Question

The restoring couple for a magnet oscillating in the vibration magnetometer is provided by

A

horizontal component of earth’s magnetic field

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B

gravity

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C

torsion in the suspended thread

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D

magnetic field of magnet

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Solution

The correct option is A horizontal component of earth’s magnetic field
When the bar magnet in vibration magnetometer is displaced from the earth's magnetic field , the torque acts on it to allign it with the earth's magnetic field . So the earth's magnetic field is the restoring force.

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