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← ScienceWhich risk increases when a Carnot heat engine operates with minimal temperature difference?
A)Reduced power output from low heat flux✓
B)Increased thermal stress on cylinder walls
C)Elevated fuel consumption from inefficiency
D)Decreased cycle time due to faster expansion
💡 Explanation
When the temperature difference is minimal, the heat transfer rate decreases because it is proportional to the temperature gradient, limiting the rate of energy conversion, resulting in reduced power output. Therefore reduced power output occurs, rather than stress, consumption, or cycle time changes which arise from different operational limits.
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