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An iron rod of 0*2cm^2 area of cross-sec...

An iron rod of `0*2cm^2` area of cross-section is subjected to a magnetising field of `1200Am^-1`.
(i) permeability, (ii) magnetic flux produced.

Text Solution

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The correct Answer is:
`7*54xx10^-4TA^-1m`; `1*81xx10^-5Wb`
Here, `A=0*2cm^2=0*2xx10^-4m^2`,
`H=1200Am^-1, chi_m=599`
`mu_r=1+chi_m=1+599=600`
`mu=mu_0mu_r=4pixx10^-7xx600`
`=7*54xx10^-4TmA^-1`
Magnetic flux `phi=muHA`
`=(7*54xx10^-4)xx1200xx(0*2xx10^-4)`
`=1*81xx10^-5Wb`
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