voltamm - Note-A-Rific: Voltmeters & Ammeters...

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Note-A-Rific: Voltmeters & Ammeters Voltmeters and ammeters are devices used to measure the electrical characteristics of parts of a circuit. Ammeters measure current. Voltmeters measure voltage (potential difference). The tricky part is wiring them into a circuit so that they don’t have much of an effect on the circuit. o In the questions we do, we assume that we have “perfect” ammeters and voltmeters that have no effect on the circuit if wired properly. Because of the different quantities they measure, and because of the make up of a circuit, they must be wired into a circuit differently to each other. Ammeters are always wired in series to the circuit. Since the current in a series circuit is the same all the way, the current you measure with the ammeter is also the current flowing through the resistor. If the ammeter was wired in parallel, part of the current would branch off into the ammeter, part into the resistor, and you wouldn’t have an accurate reading of the
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voltamm - Note-A-Rific: Voltmeters & Ammeters...

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