why moving charges produce magnetic field? but not when its stationary.

Question

dominusscholae · Answer

Imagine the universe as a system. It will usually try to equalize stress by compensating for stress. When a charge is moving, it produces a voltage. According to Farady's law, an electric flux is produced in a proportion equal to the voltage produced by a curling electric field produced by movement of a charge. In a way, the system is trying to compensate for the new voltage by changing the flux.

anonymous · Answer

^pretty thought provoking.

anonymous · Answer

Unfortunately, "stress" is also a term in Mechanics, unrelated to the way it was used here.

anonymous · Answer

As I know, it is concerned with Einstein's relativity. You may find the answer in the book 'Feynmann's Lecture'.