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Question

North pole of an unmarked magnet can be identified by______________.

A
another magnet having its poles marked
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B
bringing an iron bar near it
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C
freely suspending it
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D
using iron filings
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Solution

The correct options are
A another magnet having its poles marked
C freely suspending it
The north pole of an unmarked magnet can be identified by bringing another magnet having its poles marked as north and south pole close to it. The attraction between north-south poles and repulsion between north-north poles can be observed.

Also if we suspend the magnet freely, it will point towards the Earth's north-south direction i.e. north pole of the magnet points to the north direction.

Iron filings and iron bar are magnetic materials, which will only be attracted to a magnet and will not help in finding the pole of a magnet.

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