Electrical appliances in homes are normally earthed so that
A
a person touching the appliances is safe from electric shock
B
both the a.c. and d.c. sources can be used
C
the appliances are maintained at a higher pd than the earth
D
the appliances are maintained at a lower pd than the earth
Verified Correct Answer: A.
Physical Principles & Numerical Solution
Earthing keeps the metal body of an appliance at earth potential (0 V). If a live wire touches the casing, current flows to the ground, preventing electric shock.
Source: Myschool Past Questions Archive (Record #47406)