A voltmeter is used to measure the voltage difference

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Unformatted text preview: ge across the resistor. To measure the current that passes through a circuit, one would use an ammeter. An ammeter is always used in series with a component. A voltmeter is used to measure the voltage difference across a component. Voltmeters are always connected in parallel with the component. All metals have a resistance, even good conducting metals have at least some resistance. The resistance of a wire is known as its resistivity (ρ). l ρL Rπd 2 R=ρ R= ⇒ρ= A πd 2 4L ( ) 4 Where, l, is the length...
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