Physics 5054 · O Level · Simple magnetism and magnetic fields
Simple magnetism and magnetic fields — practice question
Fig. 6.1 shows part of a toy containing two permanent magnets shaped as rings. A plastic rod goes through the centre of both magnets.
The upper magnet can slide up and down freely on the plastic rod. The magnetic poles on the lower magnet are shown in Fig. 6.1.
(a(i))[2]
The upper magnet floats in the air above the lower magnet.
On Fig. 6.1, mark the poles on the upper magnet and explain why it floats in the air above the lower magnet.
(a(ii))[2]
The top magnet is replaced by an iron ring.
Explain why the iron ring sticks to the lower magnet.
(b)[2]
A current-carrying wire passes at right angles through a sheet of paper.
On Fig. 6.2, draw three magnetic field lines to show the magnetic field pattern around the wire.
Indicate the direction of the field on your sketch.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Top magnet has N at the lower end and S at the upper end” …