North pole of a magnet can be identified by
$(a)$. Another magnet having its poles marked as North pole and South pole.
$(b)$. Another magnet no matter whether the poles are marked or not.
$(c)$. Using an iron bar.
$(d)$. Using iron filings.

When the north pole of a magnet is repelled by the north pole of another magnet having its poled marked as the north pole and south pole, then the north pole of the magnet is identified.

So, option $(a)$ is correct.

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Updated on: 10-Oct-2022

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