The primary function of a fuse wire is to melt and break the circuit when the current exceeds a safe limit. Alloys like lead-tin are suitable because they have a specific low melting point that can be controlled by varying the composition.
Fuse wire of appropriate thickness improves its efficiency to prevent damage. These wires are made up of :
Asked in OPSC CS Prelims 2016 · Topic: Electric Current (Electrical Power and Energy, Joule heating effect)
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