One end of an iron bar is attracted, and the other is repelled by the north pole of a bar magnet. So, Iron Bar behaves as a [[1]].

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answer is MAGNET.

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Detailed Solution

One end of an iron bar is attracted, and the other is repelled by the north pole of a bar magnet. So, Iron Bar behaves like a magnet.
Repulsion is the surest test of magnetism. Because a magnet can attract a magnet and another magnetic substance, it can only repel a magnet and no other magnetic substance. As a result, if one end of an iron bar is repelled by the north pole of a bar magnet, it is a magnet.
If the north pole attracts both ends of the bar, it is just a magnetic substance. Because if it had been a magnet, the magnet's north pole would have repelled one of the iron bar's ends.

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