Question

Area under magnetic field induction and magnetizing field intensity (b-h) loop gives

Answer 1

hysteresis is shown under this circumstance

Answer 2

Answer:

The area under magnetic field induction and magnetizing field intensity (b-h) loop give the Magnetic Hysteresis loop.

Explanation:

Because the relationship between B and H is non-linear, the Magnetic Hysteresis loop above graphically depicts the behaviour of a ferromagnetic core. Both B and H will begin with an unmagnetized core at zero or point 0 on the magnetization curve. The flux density B will also grow as illustrated by the curve from point 0 to point and as it approaches saturation if the magnetic field intensity H increases linearly with the magnetization current, I to some value. Now, if the coil's magnetizing current is decreased to zero, the magnetic field that surrounds the core is also diminished to zero. The residual magnetism in the core prevents the magnetic flux in the coils from decreasing to zero, as can be seen on the curve from point a to point b.

Thus, we must reverse the current flowing through the coil in order to lower the flux density at point b to zero. A "Coercive Force" is the magnetizing force that must be used to cancel out the remaining flux density.