True or False: The current that leaves the source must make a complete circuit and return to the source.

The statement is true because for an electric current to flow, it must complete a circuit, which means that it has to leave the source, travel through the circuit, and return back to the source. This is fundamental to the operation of electrical systems.

When a power source, like a battery or generator, provides electrical energy, it pushes electrons through a conductive path (such as wires) to perform work, such as lighting a bulb or turning on a motor. After passing through the load where work is performed, the current has to return to its source. This return path is critical; without it, the circuit would be open, and the flow of current would stop. Thus, a complete circuit is essential for the continuous flow of electricity, which is why the statement is correct.

The other options suggest conditions under which the statement might not hold true, but in standard circuit principles, the necessity for a complete loop remains constant.