Voltmeter Use in Circuits: Parallel vs Series

Thread starter AHobo
Start date Sep 9, 2008
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Electricity

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A voltmeter must be connected in parallel to measure potential difference accurately. This is because it compares the voltage between two points in a circuit. If connected in series, the voltmeter would alter the circuit's resistance and affect the measurement. The fundamental purpose of a voltmeter is to provide a comparison of electrical potential, which requires parallel connections. Therefore, proper placement is essential for accurate voltage readings.

Sep 9, 2008

AHobo

Why does a voltmeter have to be in parrallel? Why not series?

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Sep 9, 2008

atyy

Science Advisor

Because a voltmeter measures a potential difference. A difference can only be measured if you have two things to compare. So the voltmeter must be connected to the two points whose potential you wish to compare.

Sep 9, 2008

AHobo

thanks

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