Question

The electrical appliance is connected between the live and neutral wire. Then why there is a third earth wire? What purpose is served by it?

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Answer 1

Answer:

Earth Wire is the third type of wire used in household circuits in electrical appliances. The Live Wire provides the current and the Neutral Wire provides the voltage or potential difference.

The Earth Wire provides the earthing for the electrical appliance. Simply, it just connects the appliance to the Earth so as to ensure the return flow of current. If Earth Wire is not provided, the electrical appliance may be dangerous and by touching it may cause the current to flow from the human body to earth. So, shocks can be caused. This is why to provide safety for the people using electrical appliances, Earth Wire is used.

[Earth Wire is generally yellow or green in colour]

I hope this helps.

Answer 2

Answer:

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