KCET2016PhysicsThermodynamics
A Carnot engine working between ( 300 ~K ) and ( 400 ~K ) has ( 800 ~J ) of useful work. The amount of heat energy supplied to the engine from the source is
Options
- A( 2400 ~J )
- B( 3200 ~J )
- C( 1200 ~J )
- D( 3600 ~J )
Correct answer
B. ( 3200 ~J )
Step-by-step solution
Given, ( T₁=400 K ; T₂=300 K ; Q₂=800 ) We know ( =1- T₂ T₁ ) Also ( 1- T₂ T₁ = Q₂ Q₁ ) ( 1- 300 400 = 800 Q₁ ) ( 100 400 = 800 Q₁ ) ( Q₁= 800 400 100 =3200 ~J ) Therefore, amount of heat energy supplied to the engine from source is ( 3200 ~J ).