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Within a Sterling engine approximating a Carnot cycle, which consequence results when the regenerator's heat capacity diminishes?

A)Reduced engine thermal efficiency
B)Increased working fluid leakage
C)Elevated engine frictional losses
D)Diminished external heat input

💡 Explanation

Decreased regenerator heat capacity causes reduced heat absorption/release during isothermal processes; this is due to imperfect heat transfer. Therefore, the cycle deviates from ideal Carnot efficiency, because less heat is recovered for reuse, rather than other mechanical faults.

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