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Does the length of an iron bar change wh...

Does the length of an iron bar change when it is magnetized?

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When magnetised, length of an iron bar

When magnetised, length of an iron bar

An iron bar is magnetised with the help of another magnet or by subjecting it to a magnetising field. The magnetism acquired by the magnet is assumed due to the alignment of molecular magnet. Does the length to the iron bar undergo a change during the magnetisation process?

Magnetic length of a bar magnet is

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In double touch method of magnetization what is the polarity of the end of an iron bar at which the magnetizing magnet leaves ?

What will be the change in the length of each small bar magnet when a bigger bar magnet is cut into 4 equal parts parallel to the equatorial line ?