Current Circuits Components Magnets Resist Volts Index


Potential difference

Connecting a cell or battery in a complete circuit causes a potential difference across each component.

Potential differences are measured in volts (V).

The number of volts tells you the amount of energy given up as the current flows through a component.

All of the energy put in by the cell is used up as the current flows through the component.

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Potential difference in a battery Potential difference in a bulb