A movable copper conductor in an actuator is held in the gap of a permanent magnet. Current flows through the conductor, which is not parallel to the magnetic field, and the conductor moves.
Explain why the conductor experiences a force.
Predict what happens to the direction of the conductor's movement if the current is reversed while the magnetic field remains unchanged.
86 exam-style questions on Edexcel GCSE Physics 12.3 The motor effect, covering 12.3.1 The motor effect, 12.3.2 Fleming's left-hand rule, 12.3.3 Force on a conductor, and 12.3.4 Electric motors. Each one has a worked solution and a mark scheme showing where the marks go.