An iron rod of `0.1 m^(2)` area of cross- section is subjected to a magnetising field of 1000 A/m . If susceptibility of irons is 599, its magnetic permeability (T/A/m)

Options

A. `2.50xx10^(-4)`
B. `3.80xx10^(-4)`
C. `7.54xx10^(-4)`
D. `7.20xx10^(-4)`

Answer

C

Explanation

Here, `A=0.1 m^(2), H=100 A/m`
`and chi_(m)=599`
`mu_(0)= 4pixx10^(-7)Tm/A`
`mu=mu_(0)(1+chi_(m))`
`=4pixx10^(-7)(1+599)`
`=7.54xx10^(-4) Tm//A`