Final answer:
A finite period of current flow, followed by a period with no current flow, is known as pulsed current. Direct current flows in one direction, while alternating current changes direction and magnitude at regular intervals.
Step-by-step explanation:
A finite period of current flow, interrupted for a limited time during which no current flows, is known as pulsed current. Direct current (DC) flows in one direction with a fixed magnitude, whereas alternating current (AC) periodically reverses direction and varies in magnitude at regular intervals of time. For example, the type of current used in cars is usually direct current (DC), while alternating current (AC) is the type of current that is typically used in residential and commercial power applications. It's important to distinguish between these types of currents when working with electrical systems.