what is a c

"AC" stands for Alternating Current, which is a type of electrical current that periodically reverses direction and changes its magnitude continuously with time. In contrast, Direct Current (DC) flows only in one direction. AC can come in different forms, but the most common type is the sine wave, which is the waveform of the AC in most homes and offices. The voltage level of AC also reverses along with the current. AC is used in many applications, including power transmission and electric motors.