Why are voltmeters connected in parallel?
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Why are voltmeters connected in parallel?

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A voltmeter must be connected in parallel to measure the voltage of a device because objects in parallel experience the same potential difference. A voltmeter is used to measure the electrical potential difference between two locations in an electrical circuit.

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Two devices used to measure electric current and voltage are the voltmeter and ammeter. Voltmeter and ammeters can be found in some cars, digital cameras, cellphones and tuner amplifiers. A voltmeter measures the voltage of a circuit, whereas the ammeter, which gets its name from the unit for electric current, amperes, measures the current of a circuit, according to Boundless. The ammeter must be connected to a device in series because objects in a series experience the same current. The devices cannot be connected to a voltage source because ammeters are designed to work under minimal burden. Burden refers to the voltage drop across the ammeter, normally a very small fraction of a volt.

The galvanometer is an instrument that measures current flow using the movement or deflection of a needle, which is produced by a magnetic force acting on a wire that current flows through. The galvanometer is the heart of most analog meters. An analog voltmeter uses a pointer that moves across a scale according to the level of voltage and a digital would display a number.

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