Write down the appllication of Hysteresis loop.

Explanation

Applications of hysteresis loop : the significance of hysteresis loop is that it provides information such as retentivity. Coercivity, permeability, susceptibility and energy loss during one cycle of magnetisation for each ferromagnetic material . therefore, the stude of hysteresis loop will help us in selecting proper and suitable material for a given purpose. Some examples :
(i) permanent magnets: the materials with high retentivity, high coercivity and high permeability are suitabel for making permanent magnets.
Examples : steel and alnico
(ii ) Electromagnets : the materials with high initial permeability, low retentivity, low coercivity and thin hysteresis loop with smaller area are preferred to make electromagnets.
Example : soft iron and Mumetal (Nickel lron alloy ).
(iii) Core of the transformer : the materials with high initial permeability, large magnetic induction and than hysteresis loop with smaller area are needed to design transformer cores.
Examples : Soft iron