(a)[1]
Identify the metal that is able to form a permanent magnet. Tick one box: copper, iron or steel.
(b(i))[1]
On Fig. 9.1, mark the variable resistor with X.
(b(ii))[3]
Describe how the circuit is used to make a permanent magnet.
(c)[2]
On Fig. 9.2, sketch carefully the pattern of the magnetic field created by the coil.