Now if the magnetizing current is again reduced to zero, the residual magnetism (left behind magnetism) in the material is equal in magnitude to the previous value (the previous value was at point ‘b’) but now in the opposite direction at ‘e’.
Similarly, when the magnetizing current is reversed again (i-e, in the positive direction as before), the residual or retained magnetic flux is reduced to zero at point ‘f’.
By increasing the current more, the process repeats itself and the material reaches to the saturation point ‘a’ again. Therefore, as the alternating current varies between +Im and –Im, the B-H curve follows the loop ‘abcdef’. This path is called magnetic hysteresis loop.
Pingback:Strain energy in the deformed wire – msa
Pingback:Mechanical Properties of solids – msa
Pingback:long-questions-ch6-p12 – msa