- #1
cragar
- 2,552
- 3
Why do materials like aluminum cut down the value of the B field?
Like suppose we had an infinite current carrying wire wrapped with a cylinder of aluminum.
To find the B field we would use amperes law and the magnetic susceptibility of aluminum.
For example, when a superconductor is exposed to a static B field it creates surface currents to counter the B field and to make sure B is zero on the inside. But in the case of aluminum I don't think there are surface currents. And according to the Lorentz force a charged particle has to be moving to be affected by a static B field. So really the only thing that could be altered are the electron orbits. So are the electron orbits being affected and this in turn reduces the B field inside the aluminum.
Like suppose we had an infinite current carrying wire wrapped with a cylinder of aluminum.
To find the B field we would use amperes law and the magnetic susceptibility of aluminum.
For example, when a superconductor is exposed to a static B field it creates surface currents to counter the B field and to make sure B is zero on the inside. But in the case of aluminum I don't think there are surface currents. And according to the Lorentz force a charged particle has to be moving to be affected by a static B field. So really the only thing that could be altered are the electron orbits. So are the electron orbits being affected and this in turn reduces the B field inside the aluminum.