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प्रश्न
Why is it necessary to earth metallic appliances?
उत्तर
The earth wire connected to the metal sheath presents a low resistance conduction path for the electric current. This ensures that in case of any leakage of electric current in the metallic casing of the appliance, the current of the appliance will be equal to the earth. As a result, the person using this appliance remains safe from severe electric shock.
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