write the characteristics of a fuse ?
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characteristics of a fuse are :-
- It has a short length wire with a low melting point. The fuse wire is made of an alloy containing equal amounts of lead and tin. It melts at about 200°C.
- Fuse wire has higher resistance and its temperature rises much faster than the connecting copper wire in case of overload.
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Fuse wire are used in electric circuits to protect home appliances from damaging by huge amount amount of current. Fuse wire should be such that it melts immediately when strong current flows through the circuit. The same is possible if its melting point is low and resistivity or the resistance is high.
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