A sample of cast iron exhibits a magnetic field B = 0.5 T , when intensity of magnetising
Channel: Doubtnut
Date: 2020-03-29

A sample of cast iron exhibits a magnetic field B = 0.5 T , when intensity of magnetising field (H) is `10\"\"(A)/(m)`. (i) Find permeability of iron . (ii) What would be the field in air for this value of H ?