A motor drives the rollers of a parcel conveyor. At one instant, the plane of the motor coil is at right angles to the magnetic field. Current continues to flow through the coil.
What change would produce a non-zero resultant moment on the coil?
Reverse the current in the coil without moving the coil
Turn the coil through half a turn about its axle
Turn the coil through a small angle about its axle
Increase the current in the coil without moving the coil
90 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.