The direction of current flow in a circuit is defined as what?

The direction of current flow in a circuit is defined by polarity. Polarity indicates the positive and negative terminals in a circuit, which are essential for determining the flow of electric current. Current flows from the positive terminal toward the negative terminal in conventional current flow, aligning with the definition of polarity. In electrical circuits, understanding polarity is crucial because it determines how components will interact within the system, ensuring that electrical devices operate as intended and safely.

Voltage refers to the electric potential difference that causes current to flow, while current represents the actual flow of electric charge. Resistance is a measurement of how much a circuit resists the flow of current. None of these options directly define the direction of current flow, making polarity the correct choice.