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安培力和摩擦力没有任何关联,但是在长期做题中发现,不含电源电路中的安培力的一些性质与滑动摩擦力阻碍物体运动时的特征有非常相似之处,如,力的方向都是阻碍相对运动方向,力做的功都有生热的效果等等.本文着手对安培力和摩擦力的全面分析,找出相同点和不同点,力争为学生在解安培力的题目时找到捷径.一、相同点1.不含源电路(电路中不含电池),安培力为阻力例1如图1所示,水平面上有两根足够长的光滑平行金属导轨,它们的电阻可忽略不计,导体棒ba,其电阻为R,与
Ampere force and friction have nothing to do, but found in the long-term problem that some properties of the ampere force without the power circuit and the sliding friction impede the characteristics of the object movement are very similar to the force direction Is to obstruct the direction of relative movement, the work done by the force has the effects of heat generation, etc. This paper sets out to analyze the Ampere force and the friction force in an all-round way, find the similarities and differences, and strive to find students Shortcut. First, the same point 1. Does not contain the source circuit (circuit does not contain batteries), Ampere force resistance Example 1 As shown in Figure 1, the horizontal plane has two long enough smooth parallel metal rails, their resistance can be neglected Excluding the conductor bar ba, the resistance of R, and