Question

A  magnetic  needle  is  used  in  a  mariner’s  compass.

MSCERT Class 8th General Science Ch4 Magnetism

Answer 1

Magnetic needle is used in marine compass for the following reasons:

--->Generally , Sailors use marine compass to locate directions.
---> A magnet has a directive property .
 Hence Magnetic needle in marine's compass always comes to rest in North-South direction.
---> This helps the sailors to point north direction easily.

Answer 2

magnetic needle used in a compass freely rotates and always settle in the north and south direction as it is the poverty of the magnet does a magnetic needle can be used to find the direction

Explanation:

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