NEET Physics Thermodynamics Questions Solved


Two Carnot engines A and B are operated in succession. The first one, A receives heat from a source at T1 = 800 K and rejects to sink at T2 K. The second engine B receives heat rejected by the first engine and rejects to another sink at T3 = 300 K. If the work outputs of two engines are equal, then the value of T2 is -

(1) 100K

(2) 300K

(3) 550K

(4) 700K

(3) ηA=T1T2T1=WAQ1ηB=T2T3T2=WBQ2

Q1Q2=T1T2×T2T3T1T2=T1T2

WA = WB

T2=T1+T32=800+3002=550K

Difficulty Level:

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