Abstract: Using Faraday＇s law of electromagnetic electromotive force and the induced current on the static field which varies with time are solved. For the static thin induction and Kirchhoff＇s second law, the induced and revolving thin conductor loop in a uniform magnetic conductor loop, it is found that in every period, there are two time intervals, in which the induced electromotive force and the induced current take the opposite direction, and there are two time intervals, in which Lenz＇s law is false. With the circular frequency of the magnetic changes tending to infinity, the peak value of the induced electromotive force will tend to infinity, while the peak value of the induced current will tend to a constant. Only if the self-induction is ignored, the induced electromotive force and the induced current on the loop will satisfy Ohm＇s law. Finally, the magnetic field distribution in the plane which is enclosed by the thin conductor loop and the self-induction coefficient of the loop are analyzed.

Key words: Faraday＇s law of electromagnetic induction, Kirchhoff＇s second law, Lenz＇s law