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

Answer and explanation

Correct answer: B. 50

  1. Step 1: State the theoretical efficiency formula for an ideal Carnot heat engine: .
  2. Step 2: Substitute source temperature and sink temperature : .
  3. Step 3: Convert to percentage: .
Answer
50.
Why not the others: The alternative options (500, 1/2, 51) result from neglecting fundamental physical conservation laws, misapplying physical constants, or arithmetic calculation slips.

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