A “Perpetual Motion Machine” Powered by Electromagnetism (Journal Article)
Material type:
TextSeries: The Physics Teacher ; Volume 62, Number 1, January 2024Publication details: Washington : American Association of Physics Teachers , , January 2024Description: 47–49pISSN: - 0031-921X
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Abstract: “Perpetual motion” is a hypothetical type of motion that continues forever without any external energy input contributing to the system. Students should know that this is generally impossible because of energy losses due to friction or other nonconservative forces, or because some assumption has been made that violates the first or second law of thermodynamics (or both). The first law states that the total energy of an isolated system remains constant over time, and one of the most common formulations of the second law states that the entropy of an isolated system over time cannot decrease.
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