MH's ideal coil and voltage question

[tinman]

MHs question on the JT thread

What happens to the energy if you pump 100 watts of power into an ideal voltage source for 10 seconds

Poynt
Am i correct in saying-->as an ideal voltage source dose not dissipate any energy,the energy is contained in that ideal voltage source.


Brad

[tinman]

My assumption would be that since the Ideal Voltage Source has no means to dissipate nor store energy that the current flow would continue from the inductor through the Source, and at the time of the reversal of the polarity that the source would initiate a stream of charge carriers moving in the opposite direction.

Considering that at the time of a drop in voltage from the source the conductors self-inductance turns the conductor into a source, but not an ideal source, the 5h rating, it has a limit on stored energy and with no input from the source that energy would dissipate.

To hold against a change in current flow the self-inductance would need to be infinite but since it is not then the induced magnetic field would be less and resultant CEMF would be less.

So then,, at the moment the polarity is reversed from the source there would be no impedance to current flow from the source until the prior stored energy is dissipated.

And the value of that unimpeded current flow at this time would be?


Brad

[tinman]

When T=7s,would the below be correct?.\


Brad

[minnie]

   Try looking at "abstraction" in Wiki and then it might make more sense.
          John.

[Reiyuki]

tinman,

Seems there's just too many floating variables to nail down any of the 'weird' properties that show up at the extremes of an inductor.

In retrospect, you should have asked about an ideal capacitor, and the paradoxical properties of 'displacement current'