In which of the following cases, the fuse operates to break the circuit?
A
Underloading
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B
Overloading
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C
Short circuit
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D
(b) and (c) above.
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Solution
The correct option is D (b) and (c) above. A fuse operates when excessive current flows through the circuit. In a short circuit, two wires come in contact creating a low resistance path that allows a huge current. In overloading, too many appliances are used through a single wire causing a huge amount of current to flow.