It was confirmed that silver aggregate produced by redox reaction in strong magnetic field rotated the left cirumference in the vertical surface in the direction of the applied magnetic field. From an image analysis, the aspect which large rotation formed by additional matching of the local rotation of an individual silver particle was observed. The local rotation of an individual one was the motion which originated from the Lorentz force induced by the interaction between the local current which flows by charge polarization and the magnetic field; the surface charge could be decided with the negative from the rotation's direction. Though the angular velocity of the rotation was accelerated along with an increase in the strength of the applied magnetic field, an increase in the ratio was suppressed nonlinearly with the increased one. The electric charge per unit weight of the silver aggregate was estimated to be 0.7 C kg-1, when the calculation considered the nonlinear effect, which assumed dissipation process based on the results of an image data analysis which was carried out.
