In electricity AC and DC means alternating current and direct current respectively. The accelerating current flows in a continually reverses direction while the direct current flows in the same direction, but it may increase and decrease.
2 Additional Answers
AC stands for alternating current and DC stand for direct current. Alternating current is the type of electricity that comes out of a wall outlet. Direct current is the type of electricity you get from a battery.
The abbreviations AC/DC in regards to electrical currents mean alternating current and direct current. The AC current will flow one way and then the other while the DC current will flow in the same direction at all times.