Question

please please explain these

Answer 1

Most of the plugs in our home are 3 way plug which has 3 sockets and those 3 sockets are responsible for different things.One terminal in it has the live wire which carries the current from the junction box, next terminal is to take back the excess amount of chage back to the place where it originated and the next terminal has th contact of earth wire which for the safety of humans by reducing the risk of electricuting humans by earthing the excess charge in a circuit.