4.4 Transformers and Coupled Coils cont.
Step 3: Assign the (mutual inductance) dependent voltage source polarities using the rule: “If both currents flow into the dots or if both currents flow out of the dots, then the mutual voltages aid (boost) the self-inductance voltage drops¾otherwise they oppose (buck)”
N.B.: Here, aid (boost) applies since both currents flow from the terminals (ports) into transformer dots