Question detail
What does a fuel cell produce?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Chemical cells and fuel cells (chemistry only)
Question
- A. Heat energy
- B. Potential difference
- C. Mechanical energy
- D. Chemical energy
Answer
Potential difference
Explanation
A fuel cell generates a potential difference as a result of the electrochemical reactions occurring within it.
Common mistake
Misconception about the source of voltage
Students think the voltage in a fuel cell comes from the external fuel supply rather than the electrochemical reaction at the electrodes
Explain that the potential difference is produced by the spontaneous redox reactions at the anode and cathode, with the fuel (e.g. H₂) being oxidised and oxygen reduced, creating a chemical potential that drives electrons through the external circuit
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