(a(i))[1]
State the name of a material suitable for use as a temporary magnet.
(a(ii))[1]
State the name of a material suitable for use as a permanent magnet.
(a(iii))[1]
State how a magnet can be used to show that a material is non-magnetic.
(b)[4]
Using the information in Fig. 10.1, explain why the hammer strikes the metal gong again and again when the switch is closed.