In a DC circuit, current flows from which terminal to which?

In a DC circuit, current flows from the positive terminal to the negative terminal. This convention is based on historical assumptions established before the discovery of electrons. In terms of conventional current flow, which is the direction of flow of positive charge, it is defined as originating at the positive terminal, where there is a higher electrical potential, and moving towards the negative terminal, at a lower electrical potential.

This understanding is critical in electrical engineering and circuit design as it affects how components are connected and how they interact within a circuit. The flow from positive to negative helps in determining the behavior of various components like resistors, capacitors, and diodes, as well as ensuring that devices are operated safely and effectively by adhering to the defined current flow.