(Solved): Task 2 a) With the aid of diagrams explain electro-magnetic hysteresis in a ferromagnetic material ...

Task 2 a) With the aid of diagrams explain electro-magnetic hysteresis in a ferromagnetic material such as iron or steel, and state why iron is used as a material in a transformer core. b) The graph in figure 1 shows the stress strain curve during loading and unloading of a rubber sample, the shaded area is called a hysteresis loop, explain in your own words the cause of this loop. Figure 1 - Stress Strain graph for rubber (Source - Revision World)