A student compares two motor coils at the same position in the same magnetic field. The dimensions of every turn are identical. The table gives the measurements.
| Coil | Number of turns | Current / A\mathrm{A}A |
|---|---|---|
| P | 25 | 0.80 |
| Q | 40 | 0.30 |
The total turning effect is proportional to the number of turns multiplied by the current. What is the ratio of the turning effect of Q to that of P?
5:35:35:3
3:83:83:8
8:58:58:5
3:53:53:5
86 exam-style questions on Edexcel GCSE Physics 12.3 The motor effect, covering 12.3.1 The motor effect, 12.3.2 Fleming's left-hand rule, 12.3.3 Force on a conductor, and 12.3.4 Electric motors. Each one has a worked solution and a mark scheme showing where the marks go.