Scale voltmeter with zero in the center. An analog voltmeter is a galvanometer. Galvanometers measure the intensity of electric current. In fact, an ammeter is a galvanometer calibrated to measure amperes, which sometimes has a resistance in parallel (shunt) through which most of the current in the circuit circulates. If we add a series resistance to this instrument, calibrated in such a way that by knowing its value and the value of the current that circulates, the voltage value is obtained. Applying Ohm's law, V=IxR (voltage or potential difference is equal to the product of the current intensity and the resistance.
Galvanómetro - en.wikipedia.o...
Amperímetro - en.wikipedia.o...
Voltímetro - en.wikipedia.o...
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8 сен 2024