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统一用一个定则来判断安培力、洛伦兹力和感应电流的方向,简化判断过程,避免学生在选择左右手时出现错误。从微观结构和原理上分析安培力、洛伦兹力的方向判断法则(第三类右手定则),以及感应电流的方向判断法则(第四类右手定则),进一步把第三、四类右手定则合二为一。这类法则是根据经验总结出来的,现在把安培力、洛伦兹力和感应电流用同一个右手法则判定,必然给大家带来很多便捷,同时也提高了学生判断准确性。
Uniform use of a rule to determine the Ampere force, Lorentz force and the direction of the induced current, simplifying the process of judgment, to avoid students in the choice of left and right hand when an error occurs. From the microstructure and principle analysis of Ampere force, Lorentz force direction judgment rule (the third kind of right-handed rule), and the direction of induction current judgment (the fourth kind of right-handed rule), and further to the third and fourth Right-hand rule combined. Such rules are based on experience summed up, and now the Ampere force, Lorentz force and induction current with the same right-handed rule, will inevitably bring you a lot of convenience, but also improve the accuracy of the students to judge.