Exam-style question
Try this first
Which statement correctly explains energy losses in a heat engine?.
- A.All energy is converted to useful work
- B.Some energy is lost as waste heat
- C.Energy is gained from the surroundings
- D.Energy losses do not affect efficiency
Model answer
What a good answer should say
- Some energy is lost as waste heat
Explanation
Why this works
In a heat engine, not all energy is converted into work; some energy is inevitably lost as waste heat, which affects the overall efficiency of the engine.
Common mistake
No common mistake is linked to this question yet.