Question

Plz help me in this and also plz give me the reason for the answer...

Answer 1

Fuse I guess ...
because if the current exceeds the max current of the circuit..it breaks

Answer 2

the fuse, as it is designed to sacrifice itself to save the other parts. However, it is even weaker than you might think if it is a metal-element fuse (vs. a chemical fuse or some other kind). As a fuse operates close to its rating in order that a fairly small increase will blow it, the fuse runs warm, but not up to the melting point.