In a parallel circuit, what is true about the voltage?

In a parallel circuit, the defining characteristic is that the voltage across each branch is equal to the voltage of the source. This means that regardless of how many branches there are or what the resistance in each branch is, each one experiences the same voltage.

This uniformity in voltage among the branches is a consequence of how parallel circuits are configured; the terminals of all branches are connected directly to the power source. As a result, there are no voltage drops across the individual branches unless current flows through a component, and since each branch connects directly to the voltage source, they all maintain the same electrical pressure.

This is crucial for understanding how parallel circuits behave, especially in real-world applications where the demands of different loads can affect the total current but will not change the voltage available to each line connected in parallel.