The diagram below shows a machine used to lift a load: coils on an iron core connected to the mains, with an iron bar holding the load.

1. aWhat method of magnetisation is used in the machine shown? [1]
2. bThe machine can lift a maximum load of 5000 N. Suggest two ways in which it can be improved to lift a heavier load. [2]
3. cDiagrams X, Y and Z show ways of storing bar magnets. Which shows the correct way? [1]
4. dGive a reason for your answer. [1]
5. eWhy is steel classified as a hard magnetic material? [1]

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