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Single touch method of making magnets

In the single-touch method, an iron bar is rubbed with a magnet repeatedly. To magnetise an iron bar AB using a bar magnet. Place one of the poles of a bar magnet, say the north pole, over one end of the iron bar, say end A. Without lifting the bar magnet, move it along the length of the iron bar till you reach the other end, B, of the bar

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