Question

What is a fuse? Can we use 5A fuse in 15A wire or vice-versa? Why? Name commonly used materials for making fuse.

Answer 1

a fuse is a thin wire with a low melting point which prevents our electronic appliance from acsess flow of current

Answer 2

The fuse is a safety device which limits the amount of current flowing in the circuit .

No you cannot do that because that would make the current rating invalid and destroy the appliance .

The material of the electric fuse is made up of an alloy of lead and tin .

Details :

It is made up of a material which has low melting point.

This will overheat them and make them melt easily.

Thus the fuse can easily break the circuit and save it if there is any excess current flowing in the circuit.

Explanation

The fuse is generally made up of thin piece of wire so that it offers more resistance and it can melt easily.

Thus the fuse works in the heating effect of current.

H = I²Rt

H = heat .

I = Current .

R = resistance .

t = time