(c) Two pieces of iron are placed inside the glass tube.

(i) When the switch is closed, the magnetic field is the same as in the
diagram opposite. The pieces of iron become magnetised.
Label the four poles on the pieces of iron.

(ii) When the switch was closed, the pieces of iron moved.
Explain why they moved.

c Two pieces of iron are placed inside the glass tube i When the switch is closed the magnetic field is the same as in the diagram opposite The pieces of iron b class=