In a **series** circuit the components are connected one after another. Therefore if there is a break anywhere in the circuit, charge stops flowing.

There is no choice of route for the charge as it flows around the circuit so the current through the circuit so the current through each component is the same.

The current depends on the potential difference of the supply and the total resistance of the circuit. I = V/R I = current (A) V = PD (V) R = resistance (ohms)

Adding the resistances gives the total resistance of of the circuit.

For cells in series, acting in the same direction, the total potential difference is the sum of their individual potential differences.

The bigger the resistance of a component, the bigger its share of the supply PD

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