4. What is an electric fuse? Explain the principle of working of an electric fuse.
Answers
Answer:
in which bulb is fode on the condition of heat
Explanation:
electric fuse works on the heating effect of electric current. when electricity passes through the wires it creates heat. fuse is made up of a low melting point. due to the heat created by the electric current, if excess current passes through the fuse,the fuse melts down and prevents excess flow of electric current
Understanding The Working Principle Of Electrical Fuse
The primary use of an electric fuse is to protect electrical equipment from excessive current and to prevent short circuits or mismatched loads. Electrical fuses play the role of miniature circuit breakers. Apart from protecting equipment, they are also used as safety measures to prevent any safety hazards to humans.
The fuse wire in an electrical fuse is selected in such a way that it does not face any damage when the normally stipulated amount of current flows through the circuit. Under normal conditions, the fuse wire is a part of the circuitry, contributing to a complete loop for charges to flow through it. However, when an excessive amount of current flows through the fuse wire, the heating effect of current causes the fuse wire to melt. This is because the fuse wire is chosen such that it has a low melting point. This causes the loop to break thereby stopping the flow of charges in the circuit.
It is important to select a fuse that is properly specified for the circuit in consideration. For example, if the fuse that is used is underrated, then it will fail even under normal current conditions, unnecessarily breaking the circuit loop. If it is overrated, then it will not break the circuit when required and cause equipment damage and failure and may even present itself as a safety hazard.