North pole of a magnet can be identified with the help of:

Another magnet having its poles marked.

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Another magnet with the poles unmarked.

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Using an ordinary iron bar.

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Using iron filings.

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Solution

The correct option is A Another magnet having its poles marked.
The north pole of the unmarked magnet can be identified by another magnet having its pole marked as north and south pole. When we bring the north pole of the marked magnet towards the end of the unmarked magnet, one end will repel and that end is north pole of that magnet.
Hence the test of repulsion can be used to find the north pole of the given magnet.

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Question 4

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.

(d) Using iron filings.

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Question 5

A bar magnet is immersed in a heap of iron filings and pulled out. The amount of iron filling clinging to the

(a) North pole is almost equal to the south pole.

(b) North pole is much more than the south pole.

(d) Magnet will be same all along its length.

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Q. North pole of a magnet will attract _____ pole/poles of another magnet.

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