论文部分内容阅读
1989年第五期美国《物理教师》杂志上刊有一篇短文,它以生动有趣的“眼腈会视动的猫头鹰”小玩具演示了带电体在电场中受力和静电感应等物理现象。该玩具简便易做,外形如图1所示,现介绍如下: 玩具内部结构如图2所示,两块铝薄板(8cm×11cm)A、B,使其保持平行被垂直固定在一块泡沫聚苯乙烯塑料板上,两铝板相距1.5cm.A板与另一放置在塑料板上的大铝薄板C(20cm×25cm)可以用导线连接,B板接地。一个金属小螺丝钉和一个U形金属线制的框架被固定在一饮料管的两端。水平细针穿过管子重心,管子可以细针为轴自由摆
In the fifth issue of the magazine “Physics Teachers” in 1989, there was a short essay showing the physical phenomena of the charged body in the electric field and the electrostatic induction with the lively and interesting “owl-eye-moving owl” toy. The toy is simple and easy to do, the shape shown in Figure 1, is introduced as follows: The internal structure of the toy shown in Figure 2, two pieces of aluminum sheet (8cm × 11cm) A, B, so that they remain parallel to be fixed in a piece of foam On a styrene plastic plate, two aluminum plates are separated by 1.5 cm. The A plate and another large aluminum plate C (20 cm×25 cm) placed on the plastic plate may be connected by wires, and the B plate may be grounded. A metal small screw and a U-shaped wire frame are fixed at both ends of a beverage tube. The horizontal fine needle passes through the center of gravity of the pipe, and the pipe can be freely pivoted by the fine needle.