Which type of electric current switches direction and flows in both directions?

The type of electric current that switches direction and flows in both directions is Alternating Current (AC). AC is characterized by its ability to change its direction periodically, which allows it to flow in one direction and then reverse, creating a wave-like pattern. This property of AC makes it suitable for transmitting electricity over long distances, as it can be easily transformed to higher or lower voltages, minimizing energy loss.

In contrast, Direct Current (DC) flows steadily in one direction and does not change its flow. Static current refers to charges that are stationary and does not describe a flow of electricity in either direction, while capacitance current is related to the flow of current due to the charging and discharging of a capacitor, which doesn't fit the definition of a current that continuously switches direction.