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由洛伦兹力的定义,我们知道,在磁场方向的速度不引起洛伦兹力,且洛伦兹力只会在垂直磁场的方向上,故磁场方向上的运动和垂直磁场方向上的运动相互独立,且磁场方向上运动和磁场无关。所以,我们只需详细讨论垂直磁场方向上的运动。在与磁场垂直的平面内,带电粒子速度可分解成两个分速度,其中一个分速度引起的洛伦兹力与电场力平衡,该速度不变,另一个分速度引起的洛伦兹力使该速度方向偏转。所以粒子运动应为匀速直线运动和匀速圆周运动的合成,其轨迹为一旋轮线。
From the definition of Lorentz force, we know that the velocity in the direction of the magnetic field does not cause Lorentz force, and the Lorentz force only in the direction of the vertical magnetic field, so the magnetic field direction and the vertical magnetic field direction of the movement Independent of each other, and magnetic field direction and magnetic field has nothing to do. Therefore, we only need to discuss in detail the movement in the direction of the vertical magnetic field. In the plane perpendicular to the magnetic field, the charged particle velocity can be decomposed into two partial velocities, one of which causes the Lorentz force and the electric field force balance, the velocity constant, the Lorentz force caused by the other partial velocity The speed direction is deflected. Therefore, the particle motion should be uniform linear motion and uniform circular motion synthesis, the trajectory of a spinning wheel line.