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But the power being dissipated in the meter is not zero!it displays zero
Yes, but it's not a power meter it's a voltmeter. I believe that is what he asked about.
Hi again,
Another interesting thing to do is to measure a 5v, 50 percent duty cycle
SQUARE wave with a dc meter.
If the wave is centered at zero (+2.5v and -2.5v) again the meter reads zero.
If the wave is riding on ground the meter reads close to 2.5v.
The reason of course is that the meter tries to average out the waveform.
I've used this to do quick checks on uC output pins to see if they are roughly
the right duty cycle because the output voltage is closely related to the
duty cycle and the peak voltage of the rectangular wave.
I’d hate to ruin it for 1963, but what can you make an alternating current triangular wave look like?
If, and only if, a DC voltmeter is measuring the velocity of electrons, would it be correct to say that when measuring AC sine waves having a very slow cycle, the needle on the DC voltmeter would move approximately at a speed equal to the derivative of the sine function, and according to a cosine function? Why would the needle approach zero when measuring a sine wave centered around zero volts as the cycle of this sine wave was increased?