(i) What is the function of earth wire in electrical instruments?
(ii) Explain what is short circuiting an electric supply.
(iii) What is the usual current rating of the fuse wire in the line to feed:
(a) Lights and fans? (b) Appliances of `2kW` or more power?

Explanation

(i) Earth wire in electrical instruments saves us from all possible electric shocks.
(ii) Accidentally, when live and neutral wires of an electric circuit comes into direct contact, it is called short circuiting.
(iii) (a) 5 A (b) 15A