Fig. 8.1 presents a toy train on a railway track with a tunnel. The toy train has an engine with a truck that carries a magnet. Diagram labels: tunnel; railway track; engine; magnet on truck; N; S. Fig. 8.2 shows the toy train moving towards the tunnel. Diagram labels: direction of movement; lamp; coil; track. The tunnel is made from a coil of wire covered in paper. The two ends of the coil are joined to a lamp. As the toy train passes through the coil of wire, the lamp becomes bright.
(a(i))[2]
Explain why the lamp becomes bright as the toy train passes through the coil of wire.
(a(ii))[2]
Describe two ways of increasing the brightness of the lamp.
(b(i))[1]
State which metal is used for the core of a transformer.
(b(ii))[1]
State which metal is used for the coils of a transformer.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “magnetic field from the magnet links with / cuts the (large) coil” …