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Which of the following materials is best suited to make a fuse wire? Material Melting Point Resistivity X High Low Y High High Z Low High W Low Low

Which of the following materials is best suited to make a fuse wire? Material Melting Point Resistivity X High Low Y High High Z Low High W Low Low Correct Answer Z

Concept:

  • In electronics and electrical engineering, a fuse is an electrical safety device that operates to provide over-current protection of an electrical circuit.
  • A fuse is a short piece of metal, inserted in the series with the circuit.
  • It melts when excessive current flows through it and thus breaks the circuit.

Explanation:

  • The function of a fuse is to carry the normal current without overheating.
  • When the current exceeds its normal value a metal wire or strip melts down, thereby interrupting the current.

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  • Resistance should be high as it protects the circuit from high current flow.
  • The resistance of the element used in the fuse generates heat if a high current flows through the circuit.
  • Temperature increases very quickly and reaches its melting point. 
  • It has a low melting point so that it melts when a short-circuit or overloading takes place.
  • The fuse wire is made up of Sn (tin) and Pb (lead) alloy because of its high resistance and low melting point.

Related Questions

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