Question

How does an electric fuse prevent the circuit and the appliances from possible damage due to short circuiting or overloading?

Answer 1

Step 1: Understanding the electric fuse
An electric fuse is a safety device that is connected in series with the circuit. It consists of a thin wire that is designed to melt or break if the current flowing through it exceeds a certain level.

Step 2: Role of the fuse in short circuiting
In the event of a short circuit, the current suddenly increases to a dangerously high level. The fuse wire, being of a low melting point, melts due to the excessive heat generated by the high current. This breaks the circuit, preventing further flow of current and protecting the appliances from damage.

Step 3: Role of the fuse in overloading
In case of overloading, when too many devices are connected or the current exceeds the normal rating, the fuse again melts. This prevents overheating of wires and avoids potential fire hazards, protecting both the circuit and the appliances.

Step 4: Conclusion
The fuse acts as a protective device by cutting off the supply of electricity during short circuits or overloads, preventing damage to the circuit and appliances.