Question

A magnetic field of `1600Am^-1` produces a magnetic flux of `2*4xx10^-5` weber in a bar of iron of cross section `0*2cm^2`. Calculate permeability and susceptibility of the bar.

Answer 1

Magnetic induction, `B=(phi)/(A)=(2.4xx10^(-5))/(0.2xx10^(-4))=1.2Wb//m^(2)`
i) Permeability, `mu=(B)/(H)=(1.2)/(1600)=7.5xx10^(-4)TA^(-1)m`
ii) As `mu=mu_(0)(1+chi)` then
Susceptibility, `chi=(mu)/(mu_(0))-1=(7.5xx10^(-4))/(4pixx10^(-7))-1=596.1`