give reason : the material used for fuse has low melting point.
Answers
Answer:
because if the current exceeds the limiting value then the temperature of wire increases and the fuse wire melts and breaks down at that very moment.
Answer:
The material used for the fuse wire has a low melting point so that it melts easily when an excess of current is passed through them.
Explanation:
The material used as a fuse wire should have a low melting point. The function of the fuse wire is to melt when an excess amount of current is passed through the circuit.
According to Joule's law, H = I²Rt
H - heat generated
I - the amount of current
R - resistance of the conductor
t - time of flow of current through the conductor
Heat will be generated for the current passing through the conductor. If the amount of current exceeds a certain limit the excess heat generated will melt the fuse wire. For this purpose, the material of the fuse wire should have a low melting point.