Key fact In a parallel circuit, the voltage across each branch equals the supply voltage. Resistance When resistors are connected in parallel, total resistance, R, is calculated using the equation: ...

Current, potential difference, power and resistance can be calculated to analyse circuits including potential dividers and Wheatstone bridges. Calculations may involve several steps.

Series and Parallel Circuit Series and parallel circuits are two fundamental configurations in electrical circuits, each with distinct characteristics that affect how electricity flows through ...