You have two similar bars. One is a magnet and the other is a piece of iron. Can you find out whichone of them is a magnet? Explain the process.

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Explanation:

I remember being asked something like this a while back so here's what i remember:

tie each rod to a string and hang them. the magnetized bar will face in the North-South direction and the iron bar will rest in a random direction and that's how you know which is which.

Hope that helps.. let me know if you have any follow-ups on this.

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