An illuminated display contains a step-up transformer.
The table shows meter readings taken while the display is operating.
| quantity | meter reading |
|---|---|
| primary potential difference | 230 V |
| primary current | 0.40 A |
| secondary potential difference | 4600 V |
| secondary current | 0.020 A |
A technician claims that the secondary circuit receives twenty times as much electrical power as the primary circuit because its potential difference is twenty times as large.
Explain whether the meter readings support the technician's claim.
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.