🚀 go-pugleaf

jgk@osc.COM (Joe Keane) writes:
>
>A _good_ switching power supply looks like a resistive load, the resistance
>slowly changing in response to changes in output current and input voltage.
>
>----------

Just to continue the basenote drift and give y'all some more food for 
thought (munch, munch :-)  --  two questions (with additional sub-
questions :-)    :

What sort of resistance do you suppose a switching supply looks like?  
What happens when you hook huge numbers of these up to the power grid?

Assume that the switching supply draws a pulse of current synchronized
to the line voltage, centered around the peak of the voltage.  Thus the
current isn't leading or lagging the voltage.  What is the power factor?
Why?