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Capacitance formula
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Have a go imagePlot the results from the experiment on the graph. 

Click to use calculator Calculate the gradient of the graph.

Definitions imageThe straight line graph shows us that the charge stored on the capacitor plates depends directly on the voltage applied across its plates:

Q µ V
Another way of saying this is:
Q / V = constant

This constant is the amount of charge stored on the plates for each volt applied across them:
Q / V = C
This is called the capacitance, C, and is measured in SI units called farad, F.
 

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