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MHT CET 2026 Physics question

PhysicsThermodynamicsMHT CET 2026

Carnot engine operating between temperature T and T has efficiency 0.2. When T is lowered by 45 K, its efficiency becomes 0.5. Temperatures T and T are respectively

Answer: (A)

Solution

Carnot efficiency . First case: so . Second case: so . Substituting : , hence , $ =

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Question ID VK-096008