IB Physics SL B 5 5 Electrical Power Questions
Practise IB Physics SL B.5.5 by calculating power in circuits, motors, lamps and transmission cables.
- Syllabus
- First assessment 2025
- Course
- Physics SL
- Level
- SL
Exam points
- Choose and apply P=IV, P=I^2R or P=V^2/R from the known circuit quantity to calculate power in resistors, lamps and complete circuits.
- Compare power dissipation in series and parallel components, including changes caused by resistance, switches or circuit configuration.
- Use power, efficiency, resistance and current to calculate motor output, heater/lamp limits, electrical energy transfer or energy dissipated per second.
- Explain or calculate power lost as heating in cables and wires, including the effect of current and resistance and the need to control temperature.
