Choose the correct answer-
At the time of short circuit, the current in the circuit
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Increase heavily
A short circuit happens when the live wire and the neutral wire touch directly, for example when the insulation is damaged. The current then bypasses the appliance and flows through a path of almost zero resistance.
By Ohm’s law, \(I=\frac{V}{R}\): with the same supply voltage and a very small resistance, the current becomes very large. This heavy current heats the wires and can cause a fire, which is why a fuse or MCB is fitted to cut the circuit.