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在《物理》电磁学部分中,用右手螺旋定则(安培定则)来判断直线电流的磁感线方向和环形电流磁场的方向;用左手定则来判断通电导体在磁场中的受力方向;而用右手定则判断导体在磁场中做切割磁感线运动产生的感应电动势(感应电流)的方向。在实际应用中右手螺旋定则容易掌握,而左手定则和右手定则非常容易混淆。用右手螺旋定则代替左、右手定则,可以克服记忆上的困难,使问题简单化。本文介绍如何用右手螺旋定则来巧妙代替左手定则和右手定则。
In the “physical” electromagnetics section, the right-handed helical rule (Ampere's rule) is used to determine the direction of the magnetic induction line and the direction of the ring current magnetic field; the left-hand rule is used to determine the force direction of the conducting conductor in the magnetic field ; While using the right hand rule to determine the direction of the induced electromotive force (induced current) generated by the conductor in cutting the magnetic induction line in the magnetic field. In practice, right-handed spiral rules easy to grasp, and the left-hand rule and the right-hand rule is very easy to confuse. Use the right hand spiral rule instead of left and right hand rule, you can overcome the memory difficulties, simplifying the problem. This article describes how to use the right-handed spiral rules to cleverly replace the left-hand rule and the right-hand rule.