A simple direct current motor contains a split-ring commutator. What does the commutator do?
It reverses the current in the coil every half turn, so rotation continues one way
It reverses the current in the coil every full turn, so rotation continues one way
It keeps the current in the coil constant, so the coil turns at a steady speed
It switches the current in the coil off every half turn, so the coil is not slowed
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.