I've attached a picture of my book.(adsbygoogle = window.adsbygoogle || []).push({});

So there is a figure of two inductors mutually connected.

The book says that initially, current 1 and current 2 are zero. Then when current 1 goes from 0 to I1, the energy stored in circuit is only the energy in inductor 1. <-- This is my question, but please read further.

Then it says keep I1 constant, and move current 2 from 0 to I2. The increase in energy from this is now from energy stored in inductor 2 and also the mutual energy in inductor 1, due to changing current 2 from 0 to I2.

So total energy is now Energy of Inductor 1 + Energy of Inductor 2 + Mutual Energy in Inductor 1.

But my question is... if changing current 2 from 0 to I2 resulted in mutual energy change in inductor 1, then wouldn't have bringing current 1 from 0 to I1 also have resulted in mutual energy change in inductor 2?

So then total energy would be

Energy of Inductor 1 + Energy of Inductor 2 + Mutual Energy in Inductor 1 + Mutual Energy in Inductor 2?

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# Derivation of Mutual Inductance Energy

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