Difference between revisions of "IV Graph"
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: An '''IV graph''' can be used to identify the characteristics of an unknown [[Electrical Component|electrical component]]. This may be useful when inventing new [[Electrical Component|components]]. | : An '''IV graph''' can be used to identify the characteristics of an unknown [[Electrical Component|electrical component]]. This may be useful when inventing new [[Electrical Component|components]]. | ||
: The [[Electrical Resistance|resistance]] of an [[Electrical Component|component]] can change with the [[Electrical Current|current]] or the [[Potential Difference|potential difference]]. | : The [[Electrical Resistance|resistance]] of an [[Electrical Component|component]] can change with the [[Electrical Current|current]] or the [[Potential Difference|potential difference]]. | ||
| − | : The [[Electrical Resistance|resistance]] of a [[Electrical Component|component]] can be found by taking the [[ratio]] of [[Potential Difference|potential difference]] to [[Electrical Current|current]] at a point on the curve. | + | : The [[Electrical Resistance|resistance]] of a [[Electrical Component|component]] can be found by taking the [[ratio]] of [[Potential Difference|potential difference]] to [[Electrical Current|current]] at a point on the curve of an '''IV graph'''. |
===Examples=== | ===Examples=== | ||
Revision as of 13:46, 28 February 2019
Key Stage 4
Meaning
An IV graph is a graph showing how the current (I) through a component changes with the potential difference (V) across component.
About IV Graphs
- On an IV graph the potential difference is plotted on the x-axis and the current is plotted on the y-axis.
- An IV graph can be used to identify the characteristics of an unknown electrical component. This may be useful when inventing new components.
- The resistance of an component can change with the current or the potential difference.
- The resistance of a component can be found by taking the ratio of potential difference to current at a point on the curve of an IV graph.