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Efficiency of a Carnot engine is large when (A) TH is large

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Efficiency of a Carnot engine is large when

(A) TH is large           (B) TC is low

(C) TH - TC is large    (D) TH - TC is small

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(A) TH is large
(B) TC is low
(C) TH – TC is large
[ η = \(\frac{T_H-T_C}{T_H}=1-\frac{T_C}{T_H}\), ]

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