Question

The magnetic susceptibility of a metrial of a rod is 299. Permeatbility of vaccum `mu_(0)`
A. `3771xx10^(-7)Hm^(-1)`
B. `3771xx10^(-5)Hm^(-1)`
C. `3770xx10^(-6)Hm^(-1)`
D. `3771xx10^(-8)Hm^(-1)`

Answer 1

Correct Answer - A
`"The given" chi_(m)=299`
`and " " mu_(0)=4pixx10^(-7)Hm,mu=?`
`"We know that", mu=mu_(0)(1+chi_(m))`
`therefore " " 4pixx10^(-7)(1+299) Rightarrow =4xx(22)/(7)xx10^(-7)xx300`
`" " =(2.6400)/(7)xx10^(-7)=3771.4xx10^(-7)Hm^(-1)or `
`" "cong3771xx10^(-7)Hm^(-1)`