MH's ideal coil and voltage question

[SeaMonkey]

...everybody knows that an ideal voltage source is part of the standard model for a battery...

There are, of course, (1) the Theoretical Ideal Voltage Source
and (2) the Practical Ideal Voltage Source.

The Practical Ideal Voltage Source is a design objective for
a target application.  Circuitry within the application must
be optimized to tolerate whatever limitations/variations in
internal parameters are characteristic of the Practical Source.

Chemical Voltage Sources, although idealized, will exhibit
variations which deviate considerably from the Theoretical
Model over their lifetimes as they transition from reasonably
ideal to less than ideal.

Less than Ideal is always an important consideration since it
is typically how life goes.

[MileHigh]

I really don't know what you are on about SeaMonkey because "practical ideal voltage source" is pretty much an oxymoron and a rather obtuse use of technical language when it comes to electronics.  I think we should try to keep the discussion on track and focused on the now-answered question.  Presumably Brad and Webby are also off the beaten track and are alluding to something or some effect that doesn't directly relate to the first question.

It's unfortunate that nobody that was trying to answer the first question wants to take a stab at Partzman's mini question or discuss the already-answered second question.  I view that as very disappointing, and overall the whole exercise was a fail for those that wanted to answer the first question because it had to be answered for them.  Not to mention the fact that it looks like many still don't truly understand what's going on.

What is the impedance of the five Henry inductor over the first three seconds?  A very interesting question that was never answered.

I think that John offered the best advice about going to school and I will morph it into something similar:  Go buy a good book on electronics that includes lab exercises and open it up on page one and start reading.  You can do the lab exercises on your bench and start to really learn.

[minnie]

  I'll have a guess, something like open circuit a time O to 1.666 ohms at time 3.
       John.

[MileHigh]

Yes John, you are correct!

[verpies]

No capacitance, no.

Wouldn't a charged ideal capacitor of infinite capacitance, be indistinguishable from an ideal voltage source ?