True or False: When free electrons in a conductor flow in one direction, it is referred to as electric current.

The statement is accurate because electric current is defined as the flow of electric charge, which is primarily carried by free electrons in conductors. When these electrons move in a particular direction, they create an electric current. This movement can occur under a potential difference applied across the conductor, causing the electrons to drift in a coordinated manner, which is what constitutes current flow.

In contrast, the other options introduce conditions or limitations that do not apply universally. For example, the notion that current only exists at high temperatures is misleading since current can flow at a wide range of temperatures, though resistance may change. Similarly, the reference to alternating current suggests that electric current only exists in that context, which is not true, as direct current (DC) is also a valid form of electric current where electrons flow in a single direction. Therefore, the original assertion stands as true without needing any specific conditions.