Question

The household appliances which frequently come in contact with human hands are earthed because:

Options

• In case of short circuit the current from the metallic body of the appliances directly flows into earth, thus saving the user from electric shock.

• Due to surge in current the fuse wire melts.

• The melting of fuse wire prevents current flowing into circuit and hence user is protected from electric shock.

• All of these

Answer 1

All of these

Explanation:

If a fault makes the metal body live, earthing provides a path for current to flow into the earth. The large current then melts the fuse, cutting off the supply and protecting the user from electric shock.