Question

A magnetic needle suspended horizontally by an
unspun silk fibre oscillates in the horizontal plane,
because of the restoring force originating mainly from
(a) the torsion of the silk fibre
(b) the horizontal component of earth’s magnetic field
(c) the force of gravity
(d) all the above factors

Answer 1

Explanation:

A freely suspended magnet always points in the North-South direction even in the absence of any other magnet. This

suggests that the Earth itself behaves as a magnet which causes a freely suspended magnet (or magnetic needle) to point

always in a particular direction: North

And South. The shape of the Earth's magnetic field resembles that of a bar magnet of length one-fifth of the Earth's diameter buried at its center.!

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Answer 2

Answer:

The correct option is the horizontal component of earth's magnetic field. ❤

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