A magnet is moved into a coil of wire and a potential difference is induced across the ends of the coil.
Which change would increase the induced potential difference?
Moving the magnet slower and using a coil with more turns
Moving the magnet faster and using a coil with fewer turns
Holding the magnet still inside a coil with more turns
Moving the magnet faster and using a coil with more turns
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.