4 ms·
Does anyone have an answer or idea for the "WHY?!!!" part of Figure 8's paragraph?
by networkjester 16y ago
Does anyone have an answer or idea for the "WHY?!!!" part of Figure 8's paragraph?
- jackdawjack 16y agoin figure 7, Faradays Law: changing magnetic field in the left torus induces a variable current in the wire, then via ampere's law the changing current in the wire induces a magnetic field in the second torus. However in figure 8 while there is an A field which extends to infinity, don't forget that B = curl(A) and so the magnetic field of the torus is going to be confined within it. As such there's no way to induce a new field in the additional torus. A is a potential, it's not a "real" field in as much as you can only measure things like |B| and |E| (or quantum phases induced by A in the Ahranovov-Bohm experiment)
- networkjester 16y agoThank you. That was a nice, concise answer! (it's been a while since I've had any E/M)
- tome 16y agoYou need a current to flow in order to induce a magnetic field in the second iron ring.