(a) What current is taken by a 3 kW electric geyser working on 240 V mains ?
(b) What size fuse should be used in the geyser circuit ?

What is the purpose of using a fuse in an electrical circuit?

What is the function of a fuse in the domestic electric circuit?

An electric iron is rated at 220 V, 2 kW. Why is the fuse absolutely necessary in a power circuit?

A 1.25 kW heater works on a 220 V mains supply. What current rating would a suitable fuse have ?

(a) Why are fuses fitted in the fuse box of a domestic electricity supply ? (b) What device could be used in place of the fuses ?

A current of 1A flow when an electric bulb is connect to 220 V mains. What would be the current when the same bulb is connected to 110 V mains?

What type of cell should be used in the main circuit of the potentiometer and why?

A vaccum cleaner draws a current of 2 A from the mains supply (a) What is the appropriate value of the fuse to be fitted in its circuit ? (b) What will happen if a 13 A fuse in fitted in its circuit ?