Electromagnetic induction in magnetic rod moving with high velocity

An account is given of the relativistic component-field electromagnetic theory of moving bodies, which extends orthodox relativity theory by recognising sources of the field, and it is shown to have advantages over orthodox theory in aiding physical comprehension. It is then applied to the determination of the electromagnetic field in a cylindrical rod of nonretentive ferromagnetic material, which can be either a conductor or a dielectric, in motion with high velocity through crossed fields. Particular cases investigated include the electromotive force induced in the rod by its motion through a magnetic field, it being confirmed that this is independent of the relative permeability, and the magnetisation of the rod by its motion through an electrostatic field. Expressions for the polarisation and magnetisation of the moving rod are also obtained. All the results are considerably simplified if the velocity of the rod is small compared with the velocity of light. For low velocities the theory can be presented in simple terms without reference to the theory of relativity, and for this reason, and also because of its physical basis, it is considered to have considerable advantages.