electrical -> mechanical -> light chemical -> mechanical -> light chemical -> electrical -> light nuclear -> electrical -> light
I gave my students this multiple choice question: Which of the following energy conversions takes place in a battery-operated flashlight?

Only one answer is correct among these 4 choices:
- electrical -> mechanical -> light
- chemical -> mechanical -> light
- chemical -> electrical -> light
- nuclear -> electrical -> light

Could you tell me which one is correct?

chemical -> electrical -> light