AIIMS 2019 Physics Heat Engines MCQ Question

The coefficient of performance (COP) is calculated using the formula COP = Q₂ / (Q₁ - Q₂). Substituting Q₁ = 800 and Q₂ = 500 gives COP = 500 / (800 - 500) = 500 / 300 = 5/3. However, the question incorrectly states that this value corresponds to option C, which is actually 2/3. The other options (A: 5/3, B: 3/5, D: 3/2) do not match the calculated value, confirming that the correct interpretation of the formula leads to the realization that option A is indeed the accurate representation of the COP in this scenario.