Question

WHAT is the function of earth wire in electrical instrumenta?

Answer 1

If there is some leakage of current in the wires of the appliance and the appliance is having a metal body then the body will also become a conductor and if we touch it then the current wil flow through our bodies to the ground and once the circuit is complete we will recieve a fatal shock. to prevent this, earthing is used. in this instead of our body, a wire carries the current to the earth and protects us from shock.

Answer 2

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Earth wire is used in electrical instrument because it connect the current to the earth and avoid flow of electricity outside the wire or instrument.

Hope it helps