A solenoid has core of a meaterial with relative permeability 500 and its windings carry a current of 1A. The number of turns of the solenoid is `500 m^(-1)`. The magnestization 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

Given , `mu_(r) = 500, i = 1` and n = 500
Intensity of magnestisation
`I = chi_(m)H`
`= (mu_(r) -1)n i`
`= (500 -1) xx 500 xx 1`
`= 499 xx 500 xx 1`
`= 2.495 xx 10^(5)`
`= 2.5 xx 10^(5)` A/m