Difference between revisions of "Voltmeter"
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===Meaning=== | ===Meaning=== | ||
[[File:AnalogueVoltmeter.png|right|300px|thumb|A picture showing an analogue [[voltmeter]].]] | [[File:AnalogueVoltmeter.png|right|300px|thumb|A picture showing an analogue [[voltmeter]].]] | ||
| − | A [[voltmeter]] is a measuring device used to [[measure]] the [[Potential Difference|potential difference]] between two points in a [[circuit]]. | + | A [[voltmeter]] is a measuring device used to [[measure]] the [[Potential Difference|potential difference]] between two points in a [[Electrical Circuit|circuit]]. |
===About Voltmeters=== | ===About Voltmeters=== | ||
| − | : [[Voltmeter]]s are added in [[Parallel Circuit|parallel]] to [[component]]s in a [[circuit]] to find the [[Potential Difference|potential difference]] between two points. | + | : [[Voltmeter]]s are added in [[Parallel Circuit|parallel]] to [[Electrical Component|component]]s in a [[Electrical Circuit|circuit]] to find the [[Potential Difference|potential difference]] between two points. |
: An ideal [[voltmeter]] has infinite [[Electrical Resistance|resistance]] because otherwise adding an [[voltmeter]] to a [[circuit]] would change the [[Potential Difference]] between two points. | : An ideal [[voltmeter]] has infinite [[Electrical Resistance|resistance]] because otherwise adding an [[voltmeter]] to a [[circuit]] would change the [[Potential Difference]] between two points. | ||
: [[Voltmeter]]s can be [[Analogue Voltmeter|analogue]] with a needle pointing to numbers on a dial or it can be [[Digital Voltmeter|digital]] with a number display. | : [[Voltmeter]]s can be [[Analogue Voltmeter|analogue]] with a needle pointing to numbers on a dial or it can be [[Digital Voltmeter|digital]] with a number display. | ||
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| style="height:20px; width:200px; text-align:center;" |A '''voltmeter''' placed in [[Parallel Circuit|parallel]] with a [[Electrical Bulb|bulb]]. | | style="height:20px; width:200px; text-align:center;" |A '''voltmeter''' placed in [[Parallel Circuit|parallel]] with a [[Electrical Bulb|bulb]]. | ||
|} | |} | ||
| + | |||
| + | ==Key Stage 4== | ||
| + | ===Meaning=== | ||
| + | A [[voltmeter]] is a measuring device used to [[measure]] the [[Potential Difference|potential difference]] between two points in a [[Electrical Circuit|circuit]]. | ||
| + | |||
| + | ===About Voltmeters=== | ||
| + | : [[Voltmeter]]s are added in [[Parallel Circuit|parallel]] to [[Electrical Component|component]]s in a [[Electrical Circuit|circuit]] to find the [[Potential Difference|potential difference]] between two points. | ||
| + | : An ideal [[voltmeter]] has infinite [[Electrical Resistance|resistance]] because otherwise adding an [[voltmeter]] to a [[circuit]] would change the [[Potential Difference|potential difference]] between the two points. | ||
| + | : [[Voltmeter]]s can be [[Analogue Voltmeter|analogue]] with a needle pointing to numbers on a dial or it can be [[Digital Voltmeter|digital]] with a number display. | ||
Revision as of 13:38, 25 February 2019
Contents
Key Stage 3
Meaning
A picture showing an analogue voltmeter.
A 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.
 |
| A voltmeter placed in parallel with a bulb. |
Key Stage 4
Meaning
A 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 the two points.
- Voltmeters can be analogue with a needle pointing to numbers on a dial or it can be digital with a number display.