Node (circuits)

In electrical engineering, a node is any region on a circuit between two circuit elements.

In circuit diagrams, connections are ideal wires with zero resistance, so a node consists of the entire section of wire between elements, not just a single point.

[1] According to Ohm's law, V = IR, the voltage V across any two points of a node with negligible resistance R is showing that the electric potential at every point of a node is the same.

There are some notable exceptions where the voltage difference is large enough to become significant: Dots used to mark nodes on a circuit diagram are sometimes referred to as meatballs.

[2]