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2) In particular, what about the motor-start capacitors
Forsooth, in any context whatsoever, the physics depends on ΔV, never
directly on V. The fancy name for this is /gauge invariance/. It is
a fundamental property of the EM field. It is built into the Maxwell
And (!!) your typical dimmer circuit draws current during some
small part of the circuit ...
This is a really big deal because many of their costs (including
dissipation in the distribution network) depend on ⟨I⟩² and/or ⟨ΔV⟩
Let [P] represent the algebraic average of P.
Since Ohm's law is linear (!) we can average both sides, so:
ΔV = I R
⟨ΔV⟩ = ⟨I⟩⟨R⟩
This is a really big deal because many of their costs