In a simple motor, the coil reaches the position where its plane is at right angles to the magnetic field. What is the resultant moment on the coil in this position?
A maximum, because the forces on the two sides are largest here
Zero, because the forces on the two sides of the coil are now zero
A maximum, because the forces on the two sides act in opposite ways
Zero, because the forces on the two sides act along the same line
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.