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 Jan 26 awarded Nice Question Sep 22 awarded Popular Question Jul 2 awarded Curious Mar 25 awarded Popular Question Nov 27 awarded Notable Question Oct 7 awarded Nice Question Aug 28 awarded Yearling Feb 20 revised Conservation of Energy and the Poynting Theorem added 60 characters in body Feb 20 revised Conservation of Energy and the Poynting Theorem added 759 characters in body Feb 15 revised Conservation of Energy and the Poynting Theorem added 48 characters in body Feb 15 revised Conservation of Energy and the Poynting Theorem deleted 2 characters in body Feb 14 revised Conservation of Energy and the Poynting Theorem added 1 characters in body Feb 14 asked Conservation of Energy and the Poynting Theorem Jan 23 awarded Popular Question Oct 13 comment Why Are Maxwell's Equations Preferred Before Those Proposed by H. Hertz? Please clarify. Oct 13 comment Why Are Maxwell's Equations Preferred Before Those Proposed by H. Hertz? This makes no sense: "... the equation you've quoted isn't Lorentz force because there is a missing acceleration term for the moving charged mass". What is that missing term you have in mind? Oct 13 comment Why Are Maxwell's Equations Preferred Before Those Proposed by H. Hertz? Of course, the equation should read $\nabla \times \textbf{E} = -\frac {d \textbf{B}} {d t} = - \frac {\partial \textbf{B} } {d t} + \nabla \times ( \textbf{v} \times \textbf{B})$ Oct 13 comment Why Are Maxwell's Equations Preferred Before Those Proposed by H. Hertz? Sorry, can't give page reference because it's very difficult to handle the book as it is given in the link. As for the equation incorporating Lorentz force, I just gave it in my previous post. Oct 13 comment Why Are Maxwell's Equations Preferred Before Those Proposed by H. Hertz? @Georg, However, $\nabla \times \textbf {B} = -\frac {d \textbf{B}} {d t}$ as Hertz proposed is the correct expression because it incorporates the Lorentz force and not $\nabla \times \textbf {B} = -\frac {\partial \textbf{B}} {\partial t}$ as it is in Maxwell's equations. It dosn't matter how the correct expression was arrived at. Oct 13 comment Why Are Maxwell's Equations Preferred Before Those Proposed by H. Hertz? The question still remains. Hertz' theory accounts for the voltage observed in the unipolar generator, Maxwell's theory doesn't. Is there anything which Maxwell's theory accounts for while Hertz' doesn't? If these theories are equivalent in this respect then Hertz' is superior becuse it accounts for all known facts from physical experiments.