The magnetic induction and the intensity of magnetic field inside an iron core of an electromagnet are 1 ~Wb ~m ⁻² and 150 Am ⁻¹ , respectively. The relative permeability of iron is ( ₀=4 10⁻⁷ . henry ./ m )

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Correct answer: D. 10^5 6

We know B= H= _n ₀ H Where _r is relative permeability = ₀ aligned _r & = B ₀ H & = 1 (4 10⁻⁷ )(150) = 10^5 6 aligned

The magnetic induction and the intensity of magnetic field inside an iron core of an electromagnet are 1 ~Wb ~m ⁻² and 150 Am ⁻¹ , respectively. The relative permeability of iron is ( ₀=4 10⁻⁷ . henry ./ m )

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