ANSWAgeR: Magnetized flux try well-defined: ? M???B·dA, the area integral of the magnetic field. If the integral is over a closed surface, the flux is zero; this is the famous situation which tells you that there are no point sources (called magnetic monopoles) of magnetic fields like there are for electric fields. If you like, you may interpret this as a number, but that is not really fundamental. If you talk about uniform magnetic fields which are perpendicular to a plane surface, ?M=BA , is the flux through an area A. Then, if you interpret ?M as a number, you would simply say, for example, there were 10 lines through an area of 1 m 2 if the magnetic field is 10 T. E???E · dA . This is perhaps a little easier to understand because you can have point charges. (más…)

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