See Magnetic Forces and Fields for a discussion on this. RHR-2 gives the direction of the field about the loop. A similar application of the magnetic field distribution created by Helmholtz coils is found in a magnetic bottle that can temporarily trap charged particles. This equation becomes B0nI/(2R) B 0 n I / ( 2 R ) for a flat coil of N N loops.
1).The lateral and normal distances of the magnets are designated by x and z, respectively, and the force components in lateral and normal direction by F x and F z. Helmholtz coils typically have loops with equal radii with current flowing in the same direction to have a strong uniform field at the midpoint between the loops. All measurements and calculations are investigating cuboid magnets magnetized normal to their surfaces facing each other when they are centered to each other (cf.
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