(a) Draw a labelled diagram to show the domestic electric wiring from an electric pole to a room. Give the wiring for a bulb and a three-pin socket only.
(b) State two hazards associated with the use of electricity.
(c) State the important precautions which should be observed in the use of electricity.
(d) What will you do if you see a person coming in contact with a live wire?
(e) Explain why, electric switches should not be operated with wet hands.
(b) Two hazards associated with the use of electricity are:
(i) If a person happens to touch a live electric wire, he gets a severe electric shock.
(ii) Short-circuiting due to damanged wiring or overloading of the circuit can cause electrical fire in a building.
(c) Important precautions which should be observed in the use of electricity are:
(i) Use of good quality wires
(ii) Use of fuse and proper earthing.
(iii) Use of appliances in dry condition only.
(d) If a person comes in contact with a live wire, we will switch off the main switch immediately so as to cut off the electricity supply.
(e) Electric switches should not be operated with wet hands because water is a good conductor of electricity, so the user may get electric shock.