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“电磁转化”作图题是中考作图题命题的热点之一.纵观近几年各地的中考试题,“电磁转化”作图题主要涉及这样几种类型:1.已知通电螺线管中电流的方向(电源的“+”“-”极),确定磁场的方向,判断放在通电螺线管周围小磁针的N、S极例1一通电螺线管如图1甲所示,如在其附近A、B两点放上小磁针,请标出小磁针静止时N极的指向.
“Electromagnetic conversion ” drawing questions is one of the hot spots in the examination for the title.Viewing the middle school exam questions in recent years, “electromagnetic conversion ” mapping questions mainly related to these types: 1. Known Turn on the current in the solenoid (“+” “-” pole of the power supply), determine the direction of the magnetic field, and judge the N, S poles of the small magnetic needle placed around the energized solenoid. Tube A shown in Figure 1, if in the vicinity of A, B put a small needle on both points, please mark the small magnetic needle when the N pole stationary.