A conservator compares two dehumidifiers used in a storage room.
| Dehumidifier | Energy transferred | Time |
|---|---|---|
| A | 72 000 J72\,000\ \mathrm{J}72000 J | 2.0 minutes2.0\ \mathrm{minutes}2.0 minutes |
| B | 500 J | 1.0 s |
Which dehumidifier is more powerful?
Show your calculations.
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.