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Wikipedia:Reference desk/Archives/Science/2022 December 10

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December 10

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Maxwell's third and fourth equations

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Using Formulation in SI units convention and ignoring the conventional current term of Ampere-Maxwell equation (focusing solely on the displacement current term), we have:

So my question is: why is the Maxwell-Faraday equation in the following form: and not in the following form:  ?

Many thanks, 173.209.130.10 (talk) 21:29, 10 December 2022 (UTC)[reply]

The units wouldn't match. The SI unit of the electric field is , of the magnetic field . With that the unit of the left hand side is , of the right hand side it is , i.e. the same, as it must be. The factor with unit , and if you insert that as you propose, you mess up the units of the right hand side. --Wrongfilter (talk) 21:47, 10 December 2022 (UTC)[reply]
Using natural units in which the identities take on a more symmetric appearance.  --Lambiam 05:13, 11 December 2022 (UTC)[reply]