Sunita had to replace the electrical plug of her clothes iron. She bought a three-pin plug as shown below.
When she removed the old plug, she saw that there were three wires coloured red, black and green.
(a) To which pin on the plug should she connect the green wire?
(b) To which part of the clothes iron is the green wire connected?
(c) State the function of the green wire.
Answer:
(a) The green wire is the Earthing wire that prevents any leakage current from giving the user any shocks.
The green wire is connected to the top of the plug at pin P.
(b) to the metallic body of the clothes iron.
(c) It prevents severe shocks by providing a low resistance path for any leakage current to the metallic body of the iron.