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Question:

What mean Magnectic hysteresis?

What mean Magnectic hysteresis?

Answer:

search the internet for Hysteresis curve u will get it all
It is Magnetic hysteresis which is a name for the residual magnetism in a ferro magnetic material that is magnetized by applying a magnetic field which is subsequently removed. Once the magnetic field is removed, the ferro magnetic substance should revert back to zero magnetic state, but it does not and some amount of magnetism is still retained in it. This is called magnetic hysteresis

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