wrote:

Roger Hayter wrote:
Jeff wrote:


So, at 1Hz the law has changed, eh? What new law do I need to use?


The laws are exactly the same for dc as ac, just at dc the frequency
dependant parts tend to the point that they are of no consequence.

Jeff

And, of course, they all do matter in the short time after switch-on
when things are settling.

To be pendatic again, there are 3 types of analysis: DC, AC, and transient.

In the real world, there are 3 sets of "laws" or equations for each case,
with DC being time invariant, AC in the frequency domain, and transient
in the time domain.

There is only one set of laws, but the maths is simpler for the simpler
cases. But the equations for the transient case will still give the
right answer for the DC case.

--
Roger Hayter