A transformer in a radio power supply is ideal. Its primary potential difference is 230 V and its primary current is 0.10 A. The secondary potential difference is 23 V.
Explain why the current in the secondary coil is greater than the current in the primary coil. Include a calculation of the secondary current in your answer.
108 exam-style questions on Edexcel GCSE Physics 13.2 Transformers and the National Grid, covering 13.2.1 Transformers and induction, 13.2.2 The transformer turns-ratio equation, 13.2.3 The National Grid, 13.2.4 The transformer power equation, and 13.2.5 Advantages of high-voltage transmission. Each one has a worked solution and a mark scheme showing where the marks go.