What are the differences between AC and DC currents?
AC (Alternating Current) and DC (Direct Current) are two types of electrical currents. AC current changes direction periodically, whereas DC current flows in one direction only. AC is commonly used for power distribution because it is less costly to transmit over long distances and can easily be transformed to different voltages. DC is often used in batteries, electronics, and solar power systems, as it provides a constant voltage or current.