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Question
A magnetising field of 5000 A/m produces a magnetic flux of 5×10−5 wb in an iron rod is 0.5 cm2, then the permeability of the rod will be (in H/m)
A magnetising field of 5000 A/m produces a magnetic flux of 5×10−5 wb in an iron rod is 0.5 cm2, then the permeability of the rod will be (in H/m)
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Solution
The correct option is A 2×10−4
H=5000 A/mϕ=5×10−5 wbA=0.5 cm2
(i): ϕ=→B⋅→A
B=ϕA=5×10−50.5×10−4=1 T
(ii): B=μH
μ=BH=15000=2×10−4 H/m
H=5000 A/mϕ=5×10−5 wbA=0.5 cm2
(i): ϕ=→B⋅→A
B=ϕA=5×10−50.5×10−4=1 T
(ii): B=μH
μ=BH=15000=2×10−4 H/m
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