4.4 Transformers and Coupled Coils cont.

Step 2: Assign self-inductance voltage polarities using the passive sign convention in conjunction with the directions of i1(t) and i2(t)

N.B.: i1(t) flows into the positive sign of the L1(di1(t)/dt) voltage drop and i2(t) flows into the positive sign of the L2(di2(t)/dt) voltage drop

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