Hi,
trying to improve my knowledge of inductors.

The energy stored in an inductor is proportional to the current that is flowing
through it in that certain moment. If the current increases, then (part of it or
all?) gets stored as additional energy in the magnetic field, if the current
decreases, part of the energy gets released to oppose this.

I'd three questions for Your brains:

1) The "(part of it or all?)" already written above part.

2) Suppose I increase the current in an inductor till 1A, then keep it constant
   for 1 second. What happens during this second? Do I simply waste power?

3) If I simply wasted power (continuing from the previous question), then I
   suppose I will waste some power even during the "current is increasing" part.
   Then, when current is increasing (that is, dI/dt is not zero), how much energy
   I am storing and how much I wasting (as heat, etc..)? What is the formula?

I fail to make an analogy with capacitors, as once charged they get (theoretically)
infinite impedance. Inductors instead get (theoretical) zero impedance, and this
may imply the "waste" problem stated above. As I said, I fail to make an analogy
with capacitors on this particular issue.

Thank You!

Greets,
Mario

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