An engineer is testing four different miniature water pumps, P1P_1P1, P2P_2P2, P3P_3P3, and P4P_4P4, for use in a hydroponic irrigation system. The operating current and potential difference for each pump are recorded in the table below.
| Pump | Current (A) | Potential difference (V) |
|---|---|---|
| P1P_1P1 | 1.4 | 15 |
| P2P_2P2 | 2.6 | 12 |
| P3P_3P3 | 3.6 | 9 |
| P4P_4P4 | 1.8 | 16 |
Determine which pump has the highest power consumption.
Use the equation:
power=potential difference×current \text{power} = \text{potential difference} \times \text{current} power=potential difference×current42 exam-style questions on OCR GCSE Physics Simple circuits. Each one has a worked solution and a mark scheme showing where the marks go.