CAIE IGCSE Physics Power Question Bank
Practise power as work done or energy transferred per unit time, rearranging the relationship for motors, lifting, heating, charging and generation contexts.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- calculate power from work or energy divided by time and express the result in watts
- rearrange P = W/t or P = ΔE/t to find an energy transfer or operating time
- compare devices doing equal work by recognising that the shorter time gives greater power
Covered syllabus points
1.7.4 Power question 1
Fig. 3.1 shows a model of a wind turbine used to demonstrate the use of wind energy to generate electricity. The wind is blowing towards the model, as shown.
Fig. 3.1
The mass of air passing through the circular area swept out by the turbine blades each second is 7.5 kg . The kinetic energy of the air that passes through this circular area each second is 240 J .
The kinetic energy of the air drives a generator. State the input power of the air passing through the turbine blades.
input power =
All question bank results loaded