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Questions  

A carnot engine working between 300 K and 600 K has a work output of 800 J per cycle, the amount of heat energy supplied to the engine from the source in each cycle is 

a
800 J
b
3200 J
c
1600 J
d
6400 J

detailed solution

Correct option is C

efficiency of carnot engine is η=1-T2T1  here T1=source temperature(hot)=600K (given)  T2=sink temperature(cold)=300K (given)  substitute in efficiency equation  η=1-300600 ⇒η=1−12 ⇒η=12  amount of heat energy supplied to engine is Q=?  η=Work done(W)Heat given(Q)substitute value of η, and given W=800J ⇒12=800Q  Q=1600 J

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