Give two characteristics of high tension wire.

(a) The earthing of an electric appliance is useful only if the fuse is in the live wire. Given the reason.

(b) Name the part of the appliance which is earthed.

For earthing an electrical appliance, one has to remove the paint from the metal body of the appliance where the electrical contact is made. Explain the reason.

Why is it necessary to have an earth wire installed in a power circuit, but not in a lighting circuit?