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February 9th 04, 07:37 PM

(Richard Harrison) wrote in message ...
Dr. Slick wrote:
"Err, Cecil, dQ/dt is zero at the voltage nodes."

dQ/dt is the rate of change in electrical charge with respect to time.

Charge moves in synch the applied voltage in a resistance. So, a
sinusoidal voltage node is a point in the cycle where the voltage has
zero amplitude, and so does the current. dQ/dt is hardly zero at zero
crossings of the a-c waveform.

It most certainly is. dQ/dt=0 at the voltage maxima and minima
(or the + and - peaks of the voltage).

Likewise, the voltage is always zero at the point where the peak
current occurs.

This is all assuming an infinity:1 mismatch, or full reflections.

S.