The general application of Lorentz magnetic force is introduced in this chapter, in which all the electromagnetic induction can be interpreted by Lorentz magnetic force and the physical nature is the result of Lorentz force F=qv_q×B on electric charge either metal electron is cutting magnetic flux or magnetic flux is cutting metal electron. The magnetic force is F=q(-V_B) ×B while moving magnetic flux from moving magnet is cutting static electron in coil, “-” means magnet’s reverse moving direction relative to coil. The F=qv_q×B ＋ q(-V_B) ×B is called general Lorentz magnetic force, the motion of metal electron in coil can form the current while the relative motion between coil and magnet makes the metal electron cut the magnetic flux, the electron drifts in conductor then result in induced current as well as induced voltage dU=(-Idl)/ss (Ohm\'s law ) and induced electric fiel dE=dU/dL (the definition of electric field). The electromagnetic induction gives us the obvious information that E is the original reason,I、dU and E in conductor are the phenomena of electromagnetic induction. General Lorentz magnetic force is adopted in this chapter to make detail and complete interpretation to all electromagnetic induction(including electromagnetic wave reflection mechanism, electromagnetic receiving mechanism, electronic sensors accelerator, DC generator, Hall Effect and all other electromagnetic induced products), and give demonstrations that all other views(including induced current in conductor, induced voltage in conductor, induced electric field and relativity electric magnetism) can not make detail and complete interpretation to all electromagnetic induction. Lorentz force is the nature, Faraday voltage and Lenz current are the representation, the Maxwell space induced electric field and Einstein electric field in mover’s eye are misleading representations.

What’s more, experiment method for General Lorentz magnetic force is also introduced in this chapter.

The conclusion in this chapter is that general Lorentz force is the physical nature of electromagnetic induction, the induced current and induced voltage in coil are the representations, the induced electric field in free space has no existence. The relativity electric magnetism is a mistake.