A Carnot engine works between and . What is its efficiency (in %)?

Answer and explanation

Correct answer: B. 50

  1. Step 1: The theoretical thermal efficiency of an ideal Carnot engine operating between high reservoir and low reservoir is .
  2. Step 2: Substitute source temperature and sink temperature : .
  3. Step 3: Converting the decimal fraction to a percentage gives an efficiency of 50\%.
Answer
50.
Why not the others: 300 is the temperature difference ; 1/2 is the fractional value instead of percentage; 51 is an arithmetic rounding error.

Practise more Thermodynamics.

Free questions with an explanation for every one, and full timed NEET UG mock tests.