An iron rod of `0*2cm^2` cross-sectional area is subjected to a magnetising field of `1200Am^-1`. The suscaptibility of iron is `599`. Find the permeability and the magnetic flux produced.

Options

A. `0.904 Wb`
B. `1.81xx10^(-5) Wb`
C. `0.904xx10^(-5) Wb`
D. `5.43xx10^(-5) Wb`

Answer

B

Explanation

`mu=mu(1+chi)` or `mu=4pixx10^(-7)(1+599)`
or `mu=7.536xx10^(-4) T m^(A-1)`
`B=muH=7.536xx10^(-4)xx1200T`
`phi=BA=7.536xx10^(-4)xx1200xx0.2xx10^(-4)Wb`
`=1.81xx10^(-5) Wb`