Alternating current (AC) is a type of electrical current which is used primarily in power transmission and household appliances.
This type of electrical current sometimes changes direction and magnitude continuously with time, in contrast with DC electricity, which flows only in one direction.
AC current is what is primarily used to power household and business appliances, such as kitchen appliances, televisions, electric lamps and fans, through an AC wall socket.
AC electricity can be easily converted to different voltages using transformers and is more suited to long-distance transmission, as power loss is reduced.
In the case of solar panels, DC electricity is converted into AC electricity, which can be used to power household appliances.
AC is also used to transmit information, such as is the case with telephones and cable television.