(a(i))[1]
On Fig. 8.1, indicate the North and South poles of the magnet. Write N for the North pole and S for the South pole.
(a(ii))[2]
Explain why the iron bar is pulled towards the magnet.
(b(i))[1]
Complete the diagram in Fig. 8.3 so that it shows how it can be used to make an electromagnet.
(b(ii))[1]
State one advantage that an electromagnet has over a permanent magnet.