magnetic field by the Lorentz force and the deflection caused by the Hall coefficient RH and the magnetic field strength, Hall effect is accompanied by a variety of payoffs, resulting in additional
potential difference will be iterated in the Hall potential difference, the elimination of the method: in the provisions of the current
IS and the magnetic field B, after the positive and negative directions Change the direction of the magnetic field current, measure four sets of data, take the absolute value of the sum divided
by four, the error can basically be eliminated