3 May
2005
3 May
'05
8:09 p.m.
Current
flowing != power being drawn. [...reactive vs resistive
loads and power consumed != RMS volts * RMS amps...]
An ideal capacitor or inductor, for example, presents a purely
reactive load and consumes no power even though it draws current.
With a dual
trace scope, or an X/Y scope, [...] Trigger on one, and
observe the two traces. Or feed them to X and Y and see how close
the Lissajous figure is to a circle.