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Thread: Faraday's Law Is Not a Law!

  1. #1 Faraday's Law Is Not a Law! 
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    I have concluded that Faraday's Law is not a law but rather a mathematical identity. If the change in magnetic flux linkage of the circuit is due to motion of the circuit, the resulting emf is just motional emf and is not a result of flux change. Essentially, the quantities that are multiplied together to get the emf are the flux density, the length of the conductor, and the speed of the conductor. These are the same quantities multiplied together to calculate the rate of change of the magnetic flux linkage. Faraday's Law may give the correct result, but it is not the expression of a physical principle, which I believe is a requirement of a physical law. Now, if the circuit is stationary and the magnetic flux changes, an emf will be induced in the circuit, and Faraday's Law will give this as a result. But this case is covered by the Maxwell-Faraday Law, which is one of Maxwell's equations. Between them, motional emf and the Maxwell-Faraday Law cover every case of induction. Faraday's Law is not just a combination of these two principles: Faraday's Law applies only to a circuit. Neither motional emf nor the Maxwell-Faraday Law do. Motional emf only requires a conductor, and the Maxwell-Faraday Law does not even require that.


     

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  3. #2  
    Genius Duck Moderator Dywyddyr's Avatar
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    You've already asserted this in a different thread.
    Moved to Pseudo.


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  4. #3  
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    Can anyone find an error in what I have stated?
     

  5. #4  
    Genius Duck Moderator Dywyddyr's Avatar
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    Did you read the replies in your previous thread? (Or, for that matter, the replies in the numerous other threads you created on other forums).
    Thread locked.
    "[Dywyddyr] makes a grumpy bastard like me seem like a happy go lucky scamp" - PhDemon
     

  6. #5  
    Moderator Moderator Markus Hanke's Avatar
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    Just a quick add here - I'd like to point out that Faraday's law is ultimately a manifestation of the generalised Stoke's theorem, when applied to a 1-form representing the electric field. It's just a special case of a fundamental principle in both maths and physics.
     

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