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A fuse wire is fitted in a household circuit primarily to:
AIncrease the current flowing to appliances
BConvert alternating current into direct current
CStore electrical energy for later use
DMelt and break the circuit when current becomes excessive
Answer & Solution
Correct answer: D. Melt and break the circuit when current becomes excessive
1. A short circuit or fault lets a large current flow, producing dangerous heat.
2. The chapter states that as soon as a high current flows, the fuse wire melts and breaks the circuit, avoiding any mishap.
3. The option is the opposite of its safety role, so it is wrong.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 4 "Effects of Electric Current", p.58_
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