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- 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.
- On reaching end B of the iron bar, lift the bar magnet, bring the same north pole to point A of the iron bar, and then rub move the magnet from point A to point B again.
- The process needs to be repeated about 30 to 40 times. This process is called magnetisation of the iron bar by the single-touch method.
- The end A becomes the north pole and B the south pole, which can be checked by means of a magnetic compass or a bar magnet.
- https://www.myprivatetutor.com/questions/details/3755/how-is-the-single-touch-method-of-magnetism-different-from-t
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