電検2 理論 磁気

磁気はちょっと苦手。 なのでちょっと公式まとめ

H 磁界の強さ [A/m]

B 磁束密度 B=Φ/S=μH [Wb/m^2]

S 面積 [m^2]

μ 透磁率 [H/m]

Φ 磁束 Φ=BS [Wb (Vs)] 電気回路では電流iに相当

F 起磁力 [A] 電気回路では電圧Vに相当

R 磁気抵抗 H^(-1) R=l/μμ0S 電気回路では抵抗Rに相当

L インダクタンス [H] L=μμ0SN/l =N^2/R

まあこれくらいは最低すっと出てこないと!

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