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MHT CET Physics question

PhysicsThermodynamicsMHT CET

A carnot engine whose efficiency is 40%, takes in heat from a source maintained at a temperature of 500 K. It is desired to have an engine of efficiency 60%. Then the intake temperature for the same exhaust (sink) temperature must be

Answer: (C)

Solution

gives the sink K; for , K; 500 K is

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Question ID VK-063444