A quality-control machine contains a long solenoid carrying a steady current. Positions P and Q are separated from each other but both lie well inside the solenoid.
Which describes the magnetic field at P and Q?
The field has different strengths but the same direction at P and Q
The field has equal strength but opposite directions at P and Q
The field has equal strength and the same direction at P and Q
The field has different strengths and opposite directions at P and Q
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.