An electric fuse is a safety device used in household circuits to prevent damage caused by overloading or excessive current. It is designed to break the circuit when the current exceeds a safe level, thus protecting the electrical appliances from potential damage. Thus, the correct purpose of an electric fuse is preventing damages due to overloading.
The correct option is (C): preventing damages due to overloading
Assertion (A): In the common domestic circuit, the earth wire is connected to a metallic plate buried deep inside the earth.
Reason (R): Earth wire ensures that any leakage of current to the metallic body of the appliance keeps its potential to that of the earth, so the user may not get a severe electric shock.
