A rectangular coil is placed in a magnetic field that points from left to right across the page. The coil is viewed end-on, so only two of its sides, P and Q, can be seen.
Side P is on the left and carries a current into the page. Side Q is on the right and carries a current out of the page.
Which statement describes the forces on P and Q?
P is pushed up and Q is pushed down, so the coil turns
P and Q are both pushed down, so the coil moves down
P is pushed down and Q is pushed up, so the coil turns
P and Q are both pushed up, so the coil moves upwards
48 exam-style questions on OCR GCSE Physics 4.2 Uses of magnetism, covering 4.2.1 The motor effect, 4.2.2 Fleming's left-hand rule, 4.2.3 The force on a current-carrying conductor, 4.2.4 The electric motor, 4.2.5 Electromagnetic induction, 4.2.6 Alternators and dynamos, 4.2.7 How transformers work, 4.2.8 Transformer turns ratio, 4.2.9 Potential differences and turns in transformers, and 4.2.10 Microphones, loudspeakers and headphones. Each one has a worked solution and a mark scheme showing where the marks go.