Two motorised platforms rotate exhibits during museum presentations.
The Table shows information about the motor in each platform.
| Motor | Input power in W\text{W}W | Useful power output in W\text{W}W | Operating time for one presentation in minutes |
|---|---|---|---|
| A | 42 | 36 | 12 |
| B | 34 | 30 | 20 |
A technician claims, ‘Motor B wastes less energy during one presentation because it has the lower wasted power.’
Calculate the energy wasted by each motor during one presentation.
Explain whether the technician's claim is correct.
Use your answers to (a).
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.