railway RRB Group D Mock Test Series 2024-25 General Science Physics Magnetism

The magnetic field (B) generated inside an electromagnet is equal to? (Where H is magnetic intensity, M is magnetisation of the material of the core and μo is permeability of vacuum)

1
μo(H + M)
2
μo(H + M)2
3
(H + M)/μo
4
(H + M)2/μo
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