What characterizes D.C. current?

D.C. current, or direct current, is characterized by its flow in one direction. This unidirectional movement means that the electric charge flows consistently from the positive terminal to the negative terminal of a power source. Unlike alternating current (A.C.), where the flow of charge changes direction periodically, D.C. maintains a steady direction of current flow over time.

The consistency of D.C. current makes it well-suited for many applications where stable voltage is required, such as in batteries, electronic devices, and circuitry. Understanding this characteristic of D.C. current is crucial in physics, as it affects the design and function of many electrical systems.