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“平行通电导线之间的相互作用”的演示实验,在一般教材中都有介绍,把两根竖直长导线平行地悬挂起来,导体中电流方向相同,互相吸引;导体中电流方向相反,互相排斥。按教材所述的实验装置去做,现象不明显。改用“定轴转动”现象,力矩(M)=力臂(L)×力(F),在动力大小限制时,可以通过尽量减少阻力力矩的大小,同时增大动力力臂使动力力矩增大达到转动的目的。用粗铜导线等材料制作实验器材,使通电导线相互作用演示效果明显。
“Demonstration experiment of the interaction between parallel conductive wires ” is introduced in the general teaching materials. The two vertical long wires are suspended in parallel, and the currents in the conductors are in the same direction and attract each other. The current in the conductor is in the opposite direction ,Mutually exclusive. According to the teaching of the experimental device to do, the phenomenon is not obvious. Use the “fixed axis rotation” phenomenon, torque (M) = arm (L) × force (F), the size of the power limit, you can minimize the size of the drag torque, while increasing the power arm to power Torque increases to achieve the purpose of rotation. Use thick copper wire and other materials to make experimental equipment, so that the interaction effect of conductive wire is obvious.