List the colours of the three wires in the cable connected to the plug of an electric iron.

State whether the following statements are true or false:

(a) A wire with a green insulation is usually the live wire.

(b) A miniature circuit breaker (MCB) works on the heating effect of current.

Along with live wire and neutral wire, a third wire is also used in domestic electric wiring. What name is given to this third wire?

What is the electric potential of the neutral wire in a mains supply cable ?

If fuses of 250 m A, 500 mA, 1 A, 5 A and 10 A were available, which one would be the most suitable for protecting an amplifier rated at 240 V, 180 W?