(a)[1]
Describe how a magnet can be used to determine whether a sample of material is magnetic or non-magnetic.
(b(i))[2]
Region 2 exerts a magnetic force on region 1. State the direction of the magnetic force on region 1 and explain the reason for it.
(b(ii))[1]
On Fig. 7.1, add arrows to the field lines to indicate the direction of the magnetic field close to the boundary between region 1 and region 2.
(b(iii)-1)[1]
Explain why a voltage is induced in the coil.
(b(iii)-2)[1]
Suggest why the coil needs to be close to the layer.