North pole of an unmarked magnet can be identified by:

Another magnet having its poles marked.

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Another magnet having its poles unmarked.

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Using an 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 only if we have another magnet having its pole marked as North and South pole because, only then we can see the attraction and repulsion between North-South poles and North-North poles respectively.

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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.

what are the the chemical changes that take place to an iron bar if magnetised.? what will it's its configuration be? what is exactly happening when a magnet attracts another magnet or iron? do electromagnets have poles?what are exactly magnetic poles?

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.

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

If the north pole of one bar magnet is moved closer to the south pole of another bar magnet, then the two poles will ___________.

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