1) You can make an electromagnet by ... a) using an iron nail and a coil of wire b) using a bar magnet connected to the mains c) using a battery and a pen 2) You can make an elctromagnet stronger by .... a) increasing the voltage b) using a copper core c) lowering the current 3) Electromagnets are different to permanent magnets because .... a) they can be used at night b) they can be switched on and off c) they can lift heavy loads 4) What is wrong with these results? a) They contain no units b) They have no lines c) Easy to understand d) They are poorly organised 5) Why is this a good results table? a) Easy to read-labels, units, clearly organised b) It looks nice c) It has lines d) It is big 6) What is wrong with this graph? a) It is in pen b) No labels, incorrect scale and no title c) The points are plotted incorrectly d) It is very messy 7) Why is this graph correct? a) It looks nice b) Correct labels, scale, title and units c) It is drawn in pencil d) It is on graph paper

electromagnets final

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