First slide

Magnetic properites of materials.

Question

Magnetic field applied to a ferromagnetic material is slowly increased. The magnetic domains within it

Moderate

A

Increase in size
B

Decrease in size
C

may increase or decrease in size.
D

Have no relation with the field.

Solution

The domains in which the elementary magnetic dipoles are favorably oriented with the external field, increase in size at the cost of other domains in which the elementary dipoles are not favorably oriented with the external field.

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