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带电粒子在垂直于磁场的方向以速度v运动时,所受洛伦兹力大小为f=qvB,式中速度是一相对量,与参考系的选择有关.那么,如何理解公式中的速度呢?通常存在以下3种理解:观点一:认为v是通电导线中的电荷相对于导体的速度;观点二:认为v是带电粒子相对于磁场的速度;观点三:认为v是带电
When a charged particle moves at a velocity v in the direction perpendicular to the magnetic field, the Lorentz force is f = qvB, where velocity is a relative quantity, which is related to the choice of the reference system. Then, how to understand the velocity in the formula? There are usually the following three kinds of understanding: View one: think that v is the speed of the charge in the conductive wire relative to the conductor; view two: think that v is the speed of charged particles relative to the magnetic field; view three: think that v is charged