A technician uses an electric drill and a soldering iron in a workshop. The table gives information about each device during one period of use.
| device | energy transferred in J | time in s | power in W |
|---|---|---|---|
| soldering iron | 4800 | 120 | — |
| electric drill | — | 30 | 600 |
State the equation linking power, energy transferred and time.
Calculate the power of the soldering iron.
Calculate the energy transferred by the electric drill during the 30 s period.
The electric drill has a greater power than the soldering iron.
State why the soldering iron could still transfer more energy in total during a day.
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.