In the hysteresis cycle, the value of H needed to make the intensity of magnetisation zero is called

The mass of an iron rod is 80 gm and its magnetic moment is 10 Am^(2) . If the density of iron is 8gm//c.c . Then the value of intensity of magnetisation will be

The ratio of intensity of magnetisation and magnetising field is called

The ratio of the intensity of the magnetisation to the strength of magnetising field is called