互感系数M_(21)=M_(12)的直接证明

Direct proof for the coefficient of mutual inductance M_(21)=M_(12)

从互感系数的定义式出发 ,证明了线圈 1对线圈 2的互感系数M2 1等于线圈 2对线圈 1的互感系数M12 .

The mutual inductance M 21 and M 12 of two coils are proved to be equal directly from the definition.\;