NEET 2007 Physics question

PhysicsThermodynamicsNEET 2007

An engine has an efficiency of . When the temperature of sink is reduced by , its efficiency is doubled. Temperature of the source is

Answer: (1)

Solution

Let source temperature and sink temperature (kelvin). , so ... (i). After lowering the sink temperature by 62 K: , so $ =

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Question ID VK-089899