Question

why is fuse wire placed in a live circuit? ​

Answer 1

A fuse is a circuit element made of highly resistance material such that melts when there is overloading in the circuit. It is always connected in the live wire as to break the circuit preventing the connected devices from damage...

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Answer 2

in case of , when the current of circuit suddenly or accidentally increases then fuse brakes the circuit to prevent the applicance from damaging