The potential divider circuit is an important aspect of every AS physics specification. In principle, a potential divider circuit is an application of V = IR and the properties of series circuits. Bridge circuits are a simple extension of the principles of the potential divider.
In a potential divider, such as the one shown in Figure 1, the voltage across the resistor R2 depends on the ratio of the two resistances and the voltage (potential difference) of the source. This is why the circuit is called a potential divider — it divides the potential, V0, supplied to it:
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