A technician compares two soldering irons.
| Soldering iron | Energy transferred in J\text{J}J | Time switched on in s\text{s}s |
|---|---|---|
| X | 3600 | 60 |
| Y | 5400 | 90 |
Soldering iron Y transfers more energy during the test than soldering iron X, but the technician concludes that the two soldering irons have equal powers.
Explain how the measurements support the technician's conclusion.
128 exam-style questions on Edexcel GCSE Physics 8.3 Power and efficiency, covering 8.3.1 Power and 8.3.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.