MAINS ELECTRICITY
3 marks · EasyA UK plug connects an electric iron to the mains supply.
(a)[1 mark]
Name the material used for the plug's casing.
(b)[1 mark]
State why this material is used for the casing.
(c)[1 mark]
Name the metal most commonly used for the pins inside the plug.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) plastic
(b) It is a good insulator.
(c) brass
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Gives 'plastic' for plug casing.
B1 (b) · 1 mark · States that plastic is a good insulator.
B1 (c) · 1 mark · Gives 'brass' for plug pins.
Worked solution
a) The casing is made of plastic.
b) Plastic is used because it is a good insulator.
c) The pins are made of brass.