# Potential Difference in Parallel Circuits

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IGCSE Physics Lessons
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A series of free GCSE/IGCSE Physics Notes and Lessons.

Potential Difference (Voltage) in Parallel Circuits

In these lessons, we will
• Describe how potential difference changes in parallel circuits.
• Calculate potential difference in parallel circuits.

A potential difference, also called voltage, across an electrical component is needed to make a current flow through it. Cells or batteries often provide the potential difference needed.
A potential difference of 1 volt tells us that 1 joule of energy is transferred for each coulomb of charge that is moving through the circuit.

For components connected in parallel, the potential difference across each component is the same.

Potential difference (voltage) in parallel circuits
The potential difference (voltage) across each branch of a parallel circuit is the same.

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