Question 41
Work, Energy and PowerWhich of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?
- A.Heat → Light → Sound → Kinetic
- B.Kinetic → Light → Heat → Electricity
- C.Heat → Kinetic → Electricity → Heat and Light
- D.Electricity → Kinetic → Heat → Light
- E.Heat → Sound → Kinetic → Electricity
Show the answer and explanation
Answer: C (Heat → Kinetic → Electricity → Heat and Light)
Explanation
The steam engine turns heat into kinetic energy, the generator turns kinetic energy into electricity, and the lamp turns electricity into heat and light.