Why is the magnetic vector potential of a point inside a infinite soleniod azimuthal assuming the axis of solenoid is the z axis.(adsbygoogle = window.adsbygoogle || []).push({});

Problem is the formulae [itex]A(\vec r)=\int_{v} \frac {\vec J(\vec r^{'})}{r} d\tau [/itex] doesn't hold any more due to the infinite extent of the current

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# Magnetic vector potential

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