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一、安培力作用下的物体平衡问题如图1所示都是在安培力作用下的物体平衡问题,处理这类问题的重要理论依据就是共点力作用下的物体平衡条件,有的时候还会用到闭合电路欧姆定律、动能定理、能量守恒定律等物理规律,解题的一般步骤是先对通电导体进行受力分析,再根据共点力平衡条件列方程,在受力分析时要注意三个问题:一是安培力的方向要用左手定则判断,它与电流方向和磁场方向总是垂直的,二是有摩擦力时,要注意摩擦力的方向,它总是与物体相对运动或相对运动趋势的方向相反,三是为了分析的方便,需将立体图改为侧视图或截面图.
First, the Ampere force balance of objects under the action shown in Figure 1 are under the action of Ampere balance of objects, an important theoretical basis for dealing with this type of problem is the total force under the conditions of balance, and sometimes Will use the closed circuit Ohm’s law, kinetic energy theorem, the law of conservation of energy and other physical laws, the general steps to solve the problem is the first power conductor on the force analysis, and then according to a total of force equilibrium conditions of the column equation, pay attention to the force analysis Three questions: First, the direction of Ampere force to determine the direction of the left hand, with the current direction and the magnetic field direction is always vertical, and second, there is friction, we must pay attention to the direction of friction, it is always relative to the object movement Or the opposite direction of the trend of relative movement, the third is for the convenience of analysis, the need to change the perspective view of a side view or section.