(a(i))[1]
On Fig. 9.1, suggest the poles of each bar magnet by labelling N and S on each magnet.
(a(ii))[1]
State the term used for the direction of the forces between magnet A and magnet B.
(a(iii))[1]
Describe what happens as magnet A is moved slowly towards the steel bar.
(b(i))[2]
Suggest what happens at each end of the iron rod and explain the reason for your predictions.
(b(ii))[2]
Describe and explain what happens when the two rods are brought close together.
(b(iii))[1]
State one use of an electromagnet.