Question

Explain direct and alternating current. [3 MARKS]

Answer 1

Each point: 1.5 Mark

a) Direct current (DC) :- A current that always flows in one direction only is called direct current. The current we get from a battery is a direct current.
b) Alternating current (AC) :- A current that reverses its direction periodically is called alternating current. Most power stations in our country produce alternating current. AC changes direction every 1/100 second and its frequency is 50 Hertz (Hz). One advantage of AC over DC is that it can be transmitted over long distances without much loss of energy