Quote:
Originally Posted by dfwright
The voltage differential which causes the ammeter gauge displacement is so small, that your voltmeters wouldn't be sensitive enough to register the difference. I would think it's probably down in the milli-volt levels. As stated, your volt meters would read the same.
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That I will have to test. I know the difference is big enough to be amplified and shown on the ammeter gauge as a reading, but you're right, it might still be tiny. Will have to get out my multimeter and see.
I'd need at least a 1V differential to make it useful with two needles, likely.