A washing machine has its metal body connected to earth
PHYSICS · Single correct · CBSE · Physics · Electricity: Magnetic and Heating Effects · Electricity: Magnetic and Heating Effects
Problem
A washing machine has its metal body connected to earth. If the live conductor accidentally comes in contact with the body, which of the following best explains how earthing prevents an electric shock?
(a) It brings the appliance body to the same potential as the live wire so that no potential difference exists for current to flow through a person.
(b) It offers a low-resistance path to the ground, producing a large fault current that blows the fuse and disconnects the supply.
(c) It offers a high-resistance path to earth so only a very small current can flow, keeping the user safe.
(d) It disconnects the neutral wire, thereby opening the circuit whenever the live wire touches the metal body.