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A magnetising field fo 1000 A/m produc...

A magnetising field fo 1000 A/m produces a magnetics flux of `2.4 xx10^(-5)` Wb in an iron bar of cross sectional area 0.3 `cm^(2)` what is the magnetic permeability of the iron bar ?

A

weber metre `"ampere"^(-1)`

B

weber `"metre"^(-1)"ampere"^(-1)`

C

weber `"metre"^(-2)"ampere"^(-1)`

D

weber metre ampere

Text Solution

Verified by Experts

The correct Answer is:
D
A=0.3 `cm^(2) =0.3xx10^(-4) m^(2)`
Magnetic induction `B=(phi)/(A)=(2.4xx10^(-5))/(0.3xx10^(-4))`
`=0.8 Wb//m^(2)`
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