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If a magnetising field of 1600 A//m prod...

If a magnetising field of `1600 A//m` produces a magnetic flux of `14xx10^(-5) Wb` in an iron bar of cross-sectional area `0.2 cm^(2)`. Then,

A

magnetic permeability of iron rod is around 1000

B

magnetic susceptibility is very larger than unity

C

magnetic susceptibility is 340

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
C
Magnetic field, `B=(phi)/(A)=0.7 Wb//m^(2)`,
`mu = (B)/(H)=(0.7)/(1600)=4.3 xx 10^(-4)N//A^(2)`
`mu=mu_(0)(1+chi_(m))`
`implies " "chi_(m)=340`
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