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Science · 2025 · 2 marks
CBSE 2025 · Region 4 · Set 2 · Q26
State the role of an electric fuse, used in series with an electrical appliance. Why should in an electric circuit a fuse with defined rating not be…
State the role of an electric fuse, used in series with an electrical appliance. Why should in an electric circuit a fuse with defined rating not be replaced by one with a larger rating?
Marking-scheme solution
An electric fuse is a safety device used to prevent any damage to an electrical appliance due to short-circuiting and overloading of the electrical circuit.
If a fuse wire with defined rating is replaced by one with a larger rating, then the fuse wire will not melt and the electrical appliance will be damaged due to flow of unduly high current during shortcircuiting and overloading.
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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.