Question

Why mostly all electrical home appliances like refrigerators, toasters etc. are provided with a wire having green insulation?
A) Earth wire is the insulated green copper wire which is connected to a metal plate deep inside the earth near the house.
B) It is used as a safety measure
C) Both
D) None

Answer 1

Hint:There are three wires in the switch of any home electrical appliance. One is live wire, second is neutral wire and the third is earth wire.

Step-by-Step Explanation:
Step I:
Earthing is a process in which the earth wire is connected to a metal electrode deep inside the soil or the earth near the house. It is done due to safety reasons. It is green coloured copper wire.
Step II:
If any electric fault occurs in the wires of electric appliance, then earth wire provides a low resistance conducting path to the flow of current
Step III:
If earthing of appliances is not done, then the person touching the faulty electrical appliance, is at a risk of getting an electric shock. But when earthing is done then flows through the low resistance path to the earth and the current does not affect us. Thus the person does not get an electric shock.
Step IV:
It is told that there are three wires. The colour of live wire is red, the neutral wire is blue while the earth wire can be green or yellow. Live wire carries high voltage current to run the electrical appliance. Neutral wire carries current back to the power source for better control of current and voltage.
Step V:
Option C is the right answer.

Note:Sometimes neutral wire can be mixed/confused with the earth wear. But their functions are completely different. The function of neutral wire is to serve as a path to complete the circuit. It is also connected to ground but not near the house. It is connected to ground to the main transformer or power supply near the area. The current flowing through the circuit also flows through the neutral wire. If the neutral wire breaks, then the neutral wire will gain heat due to high voltage of the running electrical appliances.