Which of the following describes the working principle of a domestic electric fuse?

💡 Solution & Explanation

A domestic electric fuse is constructed using an alloy with a low melting point and high electrical resistivity so that excessive current flow rapidly generates enough heat to melt the wire and break the circuit safely. Other combinations like high melting points would prevent the wire from melting during surges, while low resistivity would fail to generate sufficient heat. Fuses are wired in series with live household connections to protect electrical appliances from damage caused by overloading or short circuits.