Correct option is B
Fuse:
· A fuse is a protective device used in electrical circuits to prevent overcurrent, which can cause damage to the circuit components or even lead to fires.
· It consists of a metal wire or strip that melts when too much current flows through it, interrupting the circuit.
Heating Effect:
· The operation of a fuse relies on the heating effect of electric current.
· When current flows through the fuse, it generates heat due to the resistance of the metal wire.
· If the current exceeds the fuse's rated capacity, the heat generated is sufficient to melt the wire, breaking the circuit and stopping the current flow.
· This heating effect is governed by Joule's law, which states that the heat produced in a conductor is proportional to the square of the current, the resistance of the conductor, and the time for which the current flows.
· A fuse operates due to the heating effect of electric current.
· The fuse is always installed in the live wire.
· The fuse is based on inverse time-current characteristic.
· The fuse provides protection to the electrical equipment from excessive current.
