Question

What we used to protect the electric circuits from overloading and short circuits?
A) Capacitance
B) Inductance
C) Fuse wire
D) Filament wire

Answer 1

Hint:Overloading and short-circuiting result in huge flow of current which can cause potential damage to the appliance and also cause fire hazard.so, to protect from such disasters protection equipment is used for every appliance separately as well as for the mains supply.

Complete step by step solution:
The protective circuit used in equipment and mains supply is a fuse wire. A fuse wire comprises a thin wire of suitably low melting point. The purpose of keeping a low melting point is that as a large amount of current flows through the wire, it melts and breaks the circuit preventing the huge amount of current from reaching the equipment or household supply. It melts due to the heating effect of current.
Fuse is generally made up of zinc, copper, silver, aluminum or some alloys.
Once the fuse is broken, the cause of short circuiting or overload is detected and worked upon. Once the repairing is done, the circuit needs to be completed again. So, either a new fuse wire is replaced or a new fuse is put depending upon the configuration.

Thus, the correct option is (C).

Note: For protecting the electric circuit from overloading and short circuit, fuse wire is used.. If a fuse is rated 10 A, it means the fuse wire will melt or in other words the fuse will trip if a current of 10A is passed through it. Hence, the fuse protects the appliance or mains from current of 10 A and above.