Difference between revisions of "Voltmeter"
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An [[voltmeter]] is a measuring device used to [[measure]] the [[Potential Difference]] between two points in a [[circuit]]. | An [[voltmeter]] is a measuring device used to [[measure]] the [[Potential Difference]] between two points in a [[circuit]]. | ||
Revision as of 11:41, 25 October 2018
Key Stage 3
Meaning
A picture showing a voltmeter.
An voltmeter is a measuring device used to measure the Potential Difference between two points in a circuit.
About Voltmeters
- Voltmeters are added in parallel to components in a circuit to find the potential difference between two points.
- An ideal voltmeter has infinite resistance because otherwise adding an voltmeter to a circuit would change the Potential Difference between two points.
- Voltmeters can be analogue with a needle pointing to numbers on a dial or it can be digital with a number display.
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| A voltmeter placed in parallel with a bulb. |