A transformer has 200 turns on its primary coil and 50 turns on its secondary coil.
How does the potential difference across the secondary coil compare with the potential difference across the primary coil?
It is four times the potential difference across the primary coil
It is one third of the potential difference across the primary coil
It is the same as the potential difference across the primary coil
It is one quarter of the potential difference across the primary coil
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.