A theatre sound desk is powered through transformer P followed by transformer Q. All the output power from P is supplied to Q. Each transformer is 100% efficient.
| Quantity | Value |
|---|---|
| Primary potential difference of P | 230 V |
| Primary current of P | 0.24 A |
| Secondary potential difference of Q | 12 V |
What is the secondary current of Q?
0.24 A0.24\ \mathrm{A}0.24 A
0.013 A0.013\ \mathrm{A}0.013 A
19 A19\ \mathrm{A}19 A
4.6 A4.6\ \mathrm{A}4.6 A
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.