Same chapter2 marksDifficulty: Easy
What is meant by the power rating of an electrical appliance, and what does a marking of 220 V, 60 W tell you?
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2 marksDifficulty: Easy
Why is the earth wire connected to the metal body of an electrical appliance?
Original Khojo Papers practice question — not from a past board paper.
Answer
If the live wire touches the metal body, the earth wire provides a low-resistance path for the current to flow safely into the earth. This prevents a fatal shock to anyone touching the appliance and causes the fuse to blow.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Earthing keeps the body of the appliance at zero potential.
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