AC (Alternating Current) is a type of electrical current that periodically reverses direction. Unlike DC (Direct Current), which flows in a single direction, AC changes its flow back and forth, typically at a frequency of 50 or 60 hertz, depending on the region. This characteristic makes AC suitable for powering homes and businesses, as it can be easily transformed to different voltages. AC is generated by devices like generators and is commonly used in household appliances, lighting, and industrial equipment. The ability to transmit AC over long distances with minimal energy loss is one of its key advantages, making it the standard form of electricity in most parts of the world.