A solenoid has core of a material with relative permeability 500 and its windings carry a current of 1 A. The number of turns of the solenoid is 500per meter. The magnetization of the material is nearly

Options

A. `2.5 xx 10^(3) A m^(-1)`
B. `2.5 xx 10^(5) A m^(-1)`
C. `2.0 xx 10^(3) A m^(-1)`
D. `2.0 xx 10^(5) A m^(-1)`

Answer

B

Explanation

`H= nI= 500 xx 1 = 500A//m`
`chi_(e)= mu_(r)-1 = 500- 1= 499`
Magnetisation-
`I= chi_(e) H= 499 xx 500= 2.5 xx 10^(5) A//m`