MDCAT Physics MCQ #3386

A heat engine operates between 227°C and 27°C. What is its maximum possible efficiency?

MDCAT Physics MCQ #3386

  1. Question 1

    Q1. A heat engine operates between 227°C and 27°C. What is its maximum possible efficiency?

    • A) 20%
    • B) 40%
    • C) 50%
    • D) 60%

    Answer: 40%

    Explanation: Carnot efficiency = 1 - (T_cold / T_hot) = 1 - (300 / 500) = 0.4 or 40%. Other options are incorrect temperatures or calculations.