Question

The commonly used safety fuse wire is made of which material?
A. copper
B. lead
C. nickel
D. an alloy of tin and lead

Answer 1

Hint: In electronics and electrical engineering, a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. Fuse wire is used to break the circuit when the load is high so that higher currents do not damage the appliances.

Complete step-by-step answer:

Fuse is an essential component is a metal wire or strip that melts when too much current flows through it, thereby stopping or interrupting the current. It is a sacrificial device; once a fuse has operated it is an open circuit, it must be replaced or rewired, depending on type.

So fuse wires are made up of materials with lower melting points so that as soon as higher currents are passed, it gets heated up and break by melting thus breaking the circuit

The commonly used fuse wire is made of an alloy of tin and lead.

Hence option (D) is correct.

Note: Whenever we come up with this type of problem then we should also know that nowadays there are thousands of different fuse designs which have specific current and voltage ratings, breaking capacity and response times, depending on the application. The time and current operating characteristics of fuses are chosen to provide adequate protection without needless interruption.