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AP EAMCET202018 Sep 2020Evening ShiftPhysicsThermodynamicsActual

When the temperature difference between the source and sink increases, the efficiency of the heat engine

Options

  1. Adecreases
  2. Bincreases
  3. Cis not affected
  4. Dmay increase or decrease

Correct answer

B. increases

Step-by-step solution

Efficiency of heat engine is given as ( = T₁-T₂ T₁ ) ...(i) where, (T₁= ) temperature of source and ( T₂= ) temperature of sink. From Eq. (i), it is clear that when temperature difference between source and ( sink (T₁-T₂ ) ) of heat engine increases, then its efficiency ( ) increases.

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