A plotting compass is placed 2 cm from a wire carrying a constant current. The compass is then moved to 6 cm from the same wire. What happens to the strength of the magnetic field at the compass?
It increases, because the field lines are further apart at 6 cm
It decreases, because the field is weaker further from the wire
It is unchanged, because the current in the wire is still the same
It is unchanged, because the field around a wire is uniform
39 exam-style questions on AQA GCSE Physics 7.2 The motor effect, covering 7.2.1 Electromagnetism, 7.2.2 Fleming's left-hand rule (HT only), 7.2.3 Electric motors (HT only), and 7.2.4 Loudspeakers (HT only). Each one has a worked solution and a mark scheme showing where the marks go.