WBCS.LIVE practice question

The efficiency of a Carnot engine working between 227°C and 27°C is

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 100%
  2. 50%
  3. 40%
  4. 20%

Correct answer and explanation

Correct answer: 40%

Explanation: ✅ Correct Answer: C) 40% 📚 Explanation: Efficiency is calculated using temperatures in Kelvin: (1 - T_low/T_high). 227°C is 500 K and 27°C is 300 K. The calculation is 1 - (300/500), which equals 0.4. Multiplying by 100 gives an efficiency of exactly 40 percent for this heat engine.