Which of the following makes the motion of a perpetual motion machine a physical impossibility?
Correct answer: B. second law of thermodynamics
- A. fist law of thermodynamics
- B. second law of thermodynamics
- C. third law of thermodynamics
- D. None of these
Explanation
As the second law of thermodynamics states, the more energy is transformed, the more is wasted. And for a perpetual motion machine to work, it has to have the energy that was never wasted, which makes it a physical impossibility.
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About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
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