在磁现象中,有不少问题需用动量定理进行分析求解,这些问题一般都涉及磁场力冲量的计算.磁场力通常指洛仑兹力和安培力,由于它们一般是变力,因而计算它们的冲量往往是个难点.本文向大家介绍一个计算磁场力冲量的公式.一、磁场力冲量的公式1.洛仑兹力的冲量.如图1所示,带电粒子电量为 q,在磁感强度为 B 的匀强磁场中做曲线运动,现研究该粒子从 M 位置运动到 N位置过程中洛仑兹力的冲量.将粒子的运动过 In the magnetic phenomenon, there are many problems that need to be solved by the momentum theorem. These problems generally involve the calculation of magnetic force impulses. The magnetic field forces usually refer to Lorentz force and Ampere force. Since they are generally invariant, they are calculated. The impulse is often a difficult point. This article introduces a formula for calculating the impulse of magnetic force. First, the formula of magnetic force impulse 1. The impulse of Lorentz force. As shown in Figure 1, the charged particle is q, and the magnetic intensity is To do curve motion in B’s uniform magnetic field, we study the momentum of the Lorentz force during the movement of the particle from the M position to the N position.