In a simple parallel circuit, what is true about the voltage across each branch?

In a simple parallel circuit, the key characteristic is that the voltage across each branch remains consistent with the source voltage. This is due to the nature of parallel connections, where all components share the same voltage source. Therefore, every branch experiences the full voltage of the power supply, which results in the voltage across each branch being equal to the source voltage.

This uniformity allows devices in parallel to operate independently of each other in terms of current flow; variations in resistance among the branches do not affect the voltage across them. Instead, alterations in branch resistance will impact the amount of current flowing through each branch, but the voltage remains constant at the level of the source voltage.

This foundational principle is critical for understanding how parallel circuits function, which sets them apart from series circuits, where the voltage is divided among components.