Which condition must be met for an electric circuit to be considered complete?

For an electric circuit to be deemed complete, it must form a closed loop. This closed loop allows electric current to flow continuously from the power source, through the various components of the circuit, and back to the power source. If there is any break in the loop, the flow of current stops, rendering the circuit incomplete and inoperative.

A closed loop ensures that there is a pathway for the electrons to move, which is fundamental to the operation of any electric circuit. This concept is crucial as it underpins the principles of circuit design and analysis, ensuring that all components can function correctly as part of an interconnected system.

While having a power source is critical for providing the necessary voltage to drive current through the circuit, it is the presence of a complete loop that ultimately allows the circuit to operate. Similarly, including specific components like resistors or capacitors is not a requirement for a circuit to be complete; rather, these components serve various functions within the loop but are not determinative conditions for completeness.