An electric kettle rated 220 V is protected by a 5 A fuse and connected with proper…
PHYSICS · Single correct · CBSE · Physics · Electricity: Magnetic and Heating Effects · Electricity: Magnetic and Heating Effects
Problem
An electric kettle rated 220 V is protected by a 5 A fuse and connected with proper earthing. If the live wire touches its metal casing, what is the most likely immediate consequence?
(a) The kettle continues to work normally because only a small current flows through the earth wire.
(b) The earthing wire melts, leaving the metal casing live while the fuse remains intact.
(c) The fuse wire melts, opening the circuit and cutting off the supply.
(d) Current stops in the earth wire due to its high resistance, so the user may receive an electric shock.