Question

Two fuse wires have ratings of 10A and 13A.Which wire has higher resistance?

Answer 1

A fuse is an electrical safety device that protects an electrical circuit against overcurrent in electronics and electrical engineering. Its most important component is a metal wire or strip that melts when too much current runs through it, causing the current to halt or interrupt. It's a sacrificial device; after a fuse has blown, it's an open circuit that has to be repaired or replaced, depending on the type of fuse.

Complete step-by-step solution:
As a safety device, fuses have been employed. Depending on the application, there are hundreds of different fuse designs with varying current and voltage ratings, breaking capacities, and reaction times. Fuses are chosen for their time and present working characteristics in order to offer appropriate protection without causing unnecessary disruption. For most circuits, wiring rules specify a maximum fuse current rating. Fuse operation is caused by short circuits, overloading, mismatched loads, or device failure, to name a few. A short circuit will develop when a broken live wire makes contact with a metal casing that is linked to ground, and the fuse will explode. A given length of flat fuse wire has a resistance that is inversely proportional to its thickness. As a result, increasing the thickness of a fuse wire decreases the fuse resistance and increases the amount of current the fuse can carry without burning open. Because its resistance should be lower than 10A fuse wire, 13A fuse wire is thicker than 10A fuse wire.

Note: The fuse element is made of zinc, copper, silver, aluminum,[citation needed] or alloys among these or other various metals to provide stable and predictable characteristics.[4][5] The fuse ideally would carry its rated current indefinitely, and melt quickly on a small excess. The element must not be damaged by minor harmless surges of current, and must not oxidize or change its behavior after possibly years of service.