Which of the following fuse ratings would be suitable for this electric iron ?

1 A, 3 A, 5 A, 13 A

Explain the importance of using in a household electric circuit

(i) fuse, and

(ii) earthing wire.

An electric iron is rated at 230 V, 750 W. Calculate

(i) the maximum current, and

(ii) the number of units of electricity it would use in 30 minutes.

What is the function of an earth wire? Why is it necessary to earth the metallic bodies of electrical appliances?

What current is taken by a 3 kW electric geyser working on 240 V mains?