List the colours of the three wires in the cable connected to the plug of an electic iron.
State the colour coding of the three wires in a cable used for wiring in a household electrical circuit.
Distinguish between the terms `overloading' and `short-circuiting' as used in domestic circuits.
Alongwith live wire and neutral wire, a third wire is also used in domestic electric wiring. What name is given to this third wire ?
(a) 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.
(b) Which of the following fuse ratings would be suitable for electric iron ?
1 A, 3 A, 5 A, 13 A
In which wire in an A. C. housing circuit is the switch introduced to operate the lights ?
Explain the importance of using in a household electic circuit (i) fuse, and (ii) earthing wire.
What is the electric potential of the neutral wire in a mains supply cable ?