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Magnetic field and magnetic intensity ar...

Magnetic field and magnetic intensity are 1 T and 150 `"Am"^(-1)` respectively in a iron core, then its relative permeability is .......
(Take `mu_(0) = 4pi xx 10^(-7) mu m^(-1)` )

A

`(10^(6) )/( 4pi)`

B

`(10^3)/( 4pi)`

C

`(10^3)/( 6 pi)`

D

`(10^5)/( 6 pi)`

Text Solution

Verified by Experts

The correct Answer is:
D
`B= muH`
`therefore B = mu_(0) mu_(r) H`
`therefore _(r) = (B)/( mu_(0) H)`
`= (1)/( 4 xx pi xx 10^(-7) xx 150) `
`= (10^5)/( 6 pi) mu m^(-1)`
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