Question

(a) an iron ring of relative permeability meu r winding of insulated copper wire of n turns per metre when the current in the winding is I,find the expression for the magnetic field in the ring (b) the susceptibility of a magnetic material is 0.9853.Identify the type of magnetic material.Draw the modification of the field pattern on keeping a piece of this material in a uniform magnetic field.

Answer 1

magnetic field is from North Pole to the South Pole