If µr=2000 what is the magnetic field intensity in the bar?

A bar of iron 1 cm2 in cross-section has 10-4 wb of magnetic flux in it. If µr=2000 what is the magnetic field intensity in the bar?
(a) 398 x 10-4 AT/m
(b) 398 AT/m
(c) 796×103 AT/m
(d) 398×104 AT/m

Anurag Mishra Professor Asked on 1st February 2016 in Physics.
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    Answer: (b) 398 AT/m 

    Anurag Mishra Professor Answered on 21st May 2016.
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