A desk fan is used over a total period of 2.0 h. For part of this time it is running, and for the rest it is in standby mode.
The table gives information about the desk fan.
| Mode | Power | Time |
|---|---|---|
| Running | 45 W | 1.5 h |
| Standby | 2.0 W | 0.50 h |
Calculate the total energy transferred to the fan during the 2.0 h period.
105 exam-style questions on Edexcel GCSE Physics 10.3 Electrical energy and power, covering 10.3.1 The heating effect of an electric current, 10.3.2 Reducing energy transfer in wires, 10.3.3 Advantages and disadvantages of the heating effect, 10.3.4 Energy transferred by an electrical circuit, 10.3.5 Electrical power, and 10.3.6 Energy transfers in domestic devices. Each one has a worked solution and a mark scheme showing where the marks go.