IB Physics · A.3 · data analysis
Energy-converter audit 6
Space, time and motion · Work, energy and power · Original GioPhysics question with a detailed, mark-by-mark answer guide.
- Demand
- routine
- Marks
- 4
- Topics
- 2
- Answer
- Complete
Question4 marks
A device takes input power 710 W and delivers useful output power 464 W. Determine its efficiency and rate of energy transfer to unwanted forms.
Task interpretation
What a complete response should do
Identify the useful evidence, process it with units, and make only the conclusion the data supports.
Name the standard relationship first, keep units attached, and show the substitution before the result.
- Response type
- data analysis
- Allocation
- 4 marks
- Demand
- routine
Ready to check?Reveal answer and worked solution
Private on this device
How did this one feel?
Use your answer and the marking steps—not confidence alone—to choose.