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易错点1:奥斯特实验中,要利用通电直导线产生的磁场影响导线下方小磁针的指向,必须注意正确控制导线的方向和导线中电流的大小.例1小胡同学非常喜欢物理,课余时间他总是喜欢利用身边的物品做物理实验.如图1所示,是小胡同学模拟“奥斯特实验”的装置图,图中AB是用方木块垫高的直导线,导线下方是一个小磁针.组装该装置时,要求____;实验操作时要求____.错解:导线处于小磁针上方;电路保持通路.错因剖析:第一个错误忽略了自由静止在地面上的小磁针由于地磁场的作用,会自然地
Easy to make mistakes 1: Oersted experiment, to use the magnetic field generated by the power of the straight wire affect the direction of the small needle below the wire, we must pay attention to the correct control of the wire direction and the current wire size.Example 1 Xiao alleyer like physics, In his spare time, he always likes to use the items around him to do physics experiments.As shown in Figure 1, it is the device diagram of the simulation of “Oster Experiment” by Xiao Hutong students. In the figure, AB is the straight wire , Under the wire is a small magnetic needle assembly of the device requires ____ experimental operation requires ____. The wrong solution: the wire is located above the small needle; circuit to maintain the access. Error analysis: The first error ignored free at rest Small magnetic needle on the ground due to the role of geomagnetic field, will naturally