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Science · 2025 · 3 marks
CBSE 2025 · Region 5 · Set 1 · Q33
(a) "The third wire of earth connection is very important in domestic electric appliances." Justify this statement. (b) List two precautions to be…
(a)
"The third wire of earth connection is very important in domestic electric appliances." Justify this statement.
(b)
List two precautions to be taken to avoid the overloading of domestic electric circuits.
Marking-scheme solution
(a) The third wire (earth wire) is a safety measure to ensure that in case of any leakage of current to the metallic body of the appliance, it keeps its potential to that of the Earth and the user may not get a severe shock.
(b) (i) Use of electric fuse of proper rating
(ii) Not connecting too many appliances to a single socket.
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CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.