3. What is earthing? Why earthing is necessary in household circuits ?
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Answer:
Earthing is used to protect you from an electric shock.
it is necessary to prevent someone from getting electric shocks by touching wires.
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Explanation:
Earthing is used to protect you from an electric shock. It does this by providing a path (a protective conductor) for a fault current to flow to earth. It also causes the protective device (either a circuit-breaker or fuse) to switch off the electric current to the circuit that has the fault.
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