hi guys was wondering if anyone new life span of neodymium magnets? and do they lose power if in frequent resistance to other magnets?
High temperature jiggles the metallic lattice, allowing things to move, the presence of the magnetic field aligns the atoms when they cool and resume their position, and alignment makes for a magnetic field. Google 'curie point' for information about temperature magnetism.
Ok.. What exactly are Magnetic Moments ? (High school), I thought magnetism was a by product of an Electron in motion?
It is, and it's also produced when single unpaired electrons in atoms, align with other unpaired electrons in other atoms, and the effect is cumulative, and produces a magnetic field.
It's attractive, or repulsive, and it doesn't rely on rotation, so I guess not. Because of the 'motor rule' I suspect.
Magnetic fields are not the same as forces. Magnetic fields can cause forces on charged particles. For example, consider a magnetic field with straight, vertical field lines, equally spaced (i.e. the magnetic field magnitude is the same everywhere and it has the same direction everywhere too). A charged particle travelling in a horizontal plane, subject only to forces caused by the magnetic field, will travel in a horizontal circle. The force on that particle is centripetal - i.e. it always points towards the centre of the circular motion. But the field lines are straight (vertical). So, as you can see, circular motion in a magnetic field does not mean circular field lines.
Does all EM travel in a straight line (more or less) in a vacuum? Does all varieties of EM travel at the same speed (more or less) in a vacuum? Why? What particle (if you will) travels the path of a line of force to create this line of force? Does EM radiate from a magnet in straight lines (analogous to infrared radiation)?
