Was simulated at circuitlab.com.
Power Analysis is rooted in the phasor domain! The phasor domain is limited to sinusoidal driving sources. This is why the discussion of RMS power and it's calculation is not part of this analysis.
if :, and then
|volt-ampere va||apparent power what utility companies manage: peak power they design for, peak power they have to deliver|
|unitless||power factor, ratio of real power to apparent power, ideally 1|
|watt W||real, average, active power ... what consumers want to pay for (watt-hours)|
|volt-amp-reactive var||reactive power ... why not all outlets in a room are on the same circuit breaker|
ELI ... voltage leads the current through an inductor
Derivatives cause a lag ... a delay in time ... which is a positive angle in sinusoidal.