Electric current and potential difference


Current is the rate of flow of charge round the circuit. Current will only flow through a component if there is a voltage across that component.

Voltage (potential difference) is the driving force that pushes the current round. Kind of like 'electrical pressure'.

Resistance is anything in the circuit which slows the flow down.

Theres a balance - the voltage is trying to push the current round the circuit, and the resistance is opposing it - the relative sizes of the voltage and resistance decide how big the current is.

If you increase the voltage - then more current will flow.

If you increase the resistance - then less current will…


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