When an iron bar is magnetized, there will be a slight increase in its length. Explain

Open in App

Solution

When an iron piece is magnetized, the closed molecular chains break down, and all molecules begin to align themselves in the direction of the external magnetic field.
As the magnetizing field is increased, more molecular magnets align in the given orientation.
Thus, the magnetic strength of the iron piece increases with the increase in the strength of the external magnetic field along with a slight increase in the length of the bar.
Hence, when an iron bar is magnetized, its length will be slightly increased. This effect is called magnetostriction effect

Suggest Corrections

Similar questions

When an iron bar is moved over a bar magnet along its length the attractive force

If we keep a bar magnet instead of soft iron in the solenoid then what will happen?

Will it's magnetic property will increase ?

Or It will act as an electromagnet?

If we used bar magnet instead of soft iron in making an electromagnet will it affect? Meaning on passing current will the magnetic strength of increase?

Q. A piece of iron is magnetized by sliding a bar magnet over it, as shown in the figure.

Which part of the iron piece will become the north pole?

what are the the chemical changes that take place to an iron bar if magnetised.? what will it's its configuration be? what is exactly happening when a magnet attracts another magnet or iron? do electromagnets have poles?what are exactly magnetic poles?

Join BYJU'S Learning Program