The insulation inside a metal electric iron gets damaged so that the live conductor…
PHYSICS · Multi-part · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current
Problem
The insulation inside a metal electric iron gets damaged so that the live conductor comes in direct contact with the iron’s metallic casing.
(i) Explain how the presence of an earth wire protects the user from receiving an electric shock when the fault occurs.
(ii) State what would happen if the earth connection is broken at the plug and the user touches the faulty iron. Give reason for your answer.
(iii) During such a fault the fuse in the circuit often melts more quickly when the appliance is properly earthed. Explain why.