About the magnetic field of a finite wire
نویسنده
چکیده
The Ampère theorem and the Biot–Savart law are well known tools used to calculate magnetic fields created by currents. Their use is not limited to the case of magnetostatics; they can also be used in time-dependent problems. We show in this paper that the highly classical example of a straight wire,generally treated as a simple magnetostatics problem, should be considered in the framework of time-varying fields. This academic question is a nice illustration showing the generality of the Biot–Savart law, and especially how it implicitly takes into account the charge conservation law.
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