A. person touching the appliance is safe from electric shock
B. appliances are maintained at a higher p.d. than the earth
C. appliances are maintained at a lower p.d. than the earth
D. appliances are maintained at the same p.d. with that of the earth
Correct Answer:
Option A – person touching the appliance is safe from electric shock
Explanation
Earthing of an electrical appliance meant the outer metallic case of appliance is connected with earth, wire which is welded to the end of a copper rod and it is burned in the ground. It saves the appliance during short-circuiting by passing Excessive current to earth.
