1) B = Φ/S = (4.2*10^(-3) Wb)/(2.5*10^(-3) m^2) = 1.68 T
2) Using electrical steel magnetization curve given in the textbook: magnetic field strength H corresponding to magnetic flux density 1.68 T is equal to 6000 A/m.
3) L is a length of the middle magnetic line of the core (Fig. 2).
A student in my physics class posted, in a group, a wrong answer to a question.
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Derive the circuit approximation.
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Rm = L / μS
The Attempt at a Solution
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