Read the text and complete the table with the missing information. There are two types of current: Direct current (DC) and Alternating current (AC). Direct current is a continuous flow of electrons in one direction and it never changes its direction until the power is stopped or switched off. Alternating current constantly changes its direction because of the way it is generated. The term 'frequency' is used to indicate how many times the current changes its direction in one second. Alternating current has a great advantage over direct current because it can be transmitted over very long distances through small wires, by making energy high voltage and low current. There are several quantities that are important when we are talking about electric current. Volts (V) - so named Unit of measurement (1) (2) (3) (4) (5)