The engine is supposed to work between 727 degrees C and 227 degrees C, then maximum possible efficiency is:
Correct answer: A. 1/2
- A. 1/2
- B. 1/4
- C. 3/4
- D. 1
Explanation
Option A is correct since the formula of efficiency for a heat engine is 1-(T2/T1). So if the temperature of the heat source (T1) is 727 degrees Celsius = 1000K and that of the heat sink (T2) is 227 degrees Celsius = 500K. Therefore 1- (500/1000) = ½.Option B is incorrect since it states ¼ which is not the correct answer.Option C is incorrect since it states ¾ which is not the correct answer.Option D is incorrect since it states 1 which is not correct.
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About Energy Losses and Efficiency
Efficiency compares useful output energy or power with the total input, usually expressed as a percentage. The topic covers energy losses through friction, heating, resistance and sound, along with power ratings and Sankey diagrams. Efficiency is not the same as conservation of energy, because lost energy is transferred rather than destroyed.
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