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[QUOTE="noname12345, post: 6452113, member: 583865"] Ooo-kay. But... :) Reactance results from self-inductance. And inductance is due to a change (ie. rise or fall) of voltage... I think this (from: [URL]https://en.wikipedia.org/wiki/Electrical_reactance[/URL]) explains what you are saying: "Reactance is similar to electric resistance in this respect, but differs in that reactance does not lead to dissipation of electrical energy as heat. Instead, energy is stored in the reactance, and later returned to the circuit whereas a resistance continuously loses energy." So, a mains frequency transformer's primary winding will always consume power due to its resistance, regardless of whether the secondary winding is drawing current. [/QUOTE]
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