Question

what is the function of earth wire in electrical instrument​

Answer 1

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The main function of the earth wire is to prevent live wire from overloading and absorbs the excess electrons & flows to beneath the ground . It is necessary because it prevents the electrical appliances from damage and absorbs the excess electricity from appliances.

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Answer 2

$\underline {\Huge \bold {Answer :}}$

♣ Earth wire transfers any leakage of current in the connecting wires directly to the zero potential area that is earth so that no damage or harm is been caused to us.

♣ It is neccesary to earth the metalic appliances to prevent ourself from shocks or injuries.