First slide

Magnetic properites of materials.

Question

Select the correct option:

Moderate

A

Hysteresis loss in soft iron is less then that in steel.
B

Retentivity of soft iron is less then the retentivity of steel.
C

Coercivity of soft iron is less than the coercivity of steel
D

Both 1 and 3 are correct.

Solution

Soft Iron has more rententivity than Steel. Hence, Soft Iron can be magnetised easily to strong magnet.
Soft Iron has less coercivity than Steel. Hence, Soft Iron lose magnetism faster than Steel.
Hysteresis curve of Soft iron has less area than that of Steel. Hence, Hysteresis loss in Soft Iron is less than that in Steel.
Soft Iron is good for Electromagnets (Temporary magnets). Soft Iron is used in Transformers.

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