There are two main types of current in electrical systems: direct current (DC) and alternating current (AC). Direct current flows in a single direction, making it ideal for powering devices like batteries and electronic gadgets. In contrast, alternating current changes direction periodically, which is commonly used in homes and businesses for its efficiency in transmitting electricity over long distances. Alternating current is typically generated by power plants and delivered through power lines. It can be transformed to different voltages, making it suitable for various applications. Understanding these types of current is essential for working with electrical systems and devices.