Cecil Moore wrote in news:96hKh.483$rj1.92
@newssvr23.news.prodigy.net:

Owen Duffy wrote:
Are the principles that apply to this example inconsistent with the
general case (eg dc, ac, transient, steady state etc)?

Of course, pure DC principles are not adequate to cover
general case distributed network problems. Else, there

The principles are those of the behaviour of transmission lines and the
theory applying to solving the source circuit. In the 'DC' case, the
analysis becomes trivial, but IMHO there were no underlying principles
that do not apply in the general case.

The example is a specific case of the general, and the outcome that
reflected power is not dissipated in the source resistance dissproves any
general statement to the contrary.

You could devise an example with an AC source that had exactly the same
outcome, more complicated mathematics to solve it, but the exactly the
same outcome. But you don't need to do that, the example is in the set
of the general, and stands against a general statement that power
reflected from a source is necessarily dissipated in the source.