I'm not entirely sure I follow your logic...

Generally, Watts is equal to Volts times Amps.
Watts is also called Power, or the amount of Work done.

If the Volts and Amps are in phase with each other 
then  Watts is equal to Volts times Amps.

If the Volts and Amps are out of phase with each other, 
the amount of actual work done is less than Volts times Amps 
and you use a correction factor called the Power Factor to
show or calculate that.

Generally, for DC circuits the Voltage and Current are always 
in phase with each other and the Power Factor is equal to "1".  
So you can just ignore it...

Polarity switching, as we do it for CS making, is much too slow to 
cause any sort of phase shift requiring consideration of Power
Factors.

Bottom line, Power Factor - just forget about it...
Watts or Total Power - may stand looking into...

Dan



>>> Ode Coyote <[email protected]> 4/17/2006 6:02:34 AM >>>

   I follow your logic too.
More apt perhaps...especially when using automatic polarity switching,
the 
term "power factor" comes to mind.
   Power factor? ...well... I've heard of it, seen it on charts and
"grasp" 
[at] the concept up to where it turns the calculus corner.
[ The meter tells me it's there but not its name ]
Power factor is expressed in terms of watts?   [ Like, watt the
heck!!?? :-)


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