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electronics and communication engineering materials and components
1. For a core having a relative permeability μr, magnetic dipole moment per unit volume M and field strength H, the flux density B is
(A): B = μ0 (H + M)
(B): B = μ0μr (H + M)
(C): B = μ0μr (H - M)
(D): B = μr (H + M)
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