Question

what is fuse? how it is useful​

Answer 1

Answer: fuse is a wire that helps in protecting the circuit from excessive current flow.it is a safety measure used to protect the appliances from burning .

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Answer 2

Answer:

Fuses are sacrificial devices used to protect much more expensive electrical components from the damaging effects of overcurrent. ... When too much current flows through the low resistance element of the fuse, the element melts and breaks the circuit.