Question

How can a fuse make a circuit safer?

Answer 1

Hint: You could explain what an electric fuse is. Then you could explain its working and how the connection of an electric fuse is made in the circuit so as to ensure the proper functioning. While explaining the working, you will realize how connecting the fuse to the circuit adds to its safety.

Complete answer:
In the question we are asked to explain how placing an electric fuse in an electric circuit makes that particular circuit safer.
In order to answer this, let us understand what an electric fuse is along with its working.
A fuse can be defined as an electrical safety device that can provide protection to an electrical circuit when there is over-current flow. A metal wire is the basic component of this device that has an ability to melt down when excess current flows through it thus stopping the flow of excess current in the circuit in which it is placed.
Fuse rating gives you an idea of the maximum current that can flow through a fuse above which it will blow off. The connection of the fuses goes like this. They’re connected to live wires, because they are the ones that are connected directly to the generators of the electric supply company. On doing so, cuts this direct connection when the fuse melts itself and hence, prevents the appliance from damage due to the excess current flow.

Note:
Interesting fact about a fuse is that it is a self sacrificial device. It gets this name due to the fact that it blows off when there is too much current in the circuit and protects the circuit but by sacrificing itself. But, when this happens one should make sure that it is replaced sooner than later, for the circuit is at high risk in the absence of a fuse in it.