论文部分内容阅读
一、器材1.取麦乳精空铁罐一个(直径8.5厘米,高17厘米),装入冷水,不会漏出即可,若有漏水现象,需用焊锡焊补。在离筒底高6厘米处的外表面上,沿径向开两个孔,一个孔的直径较小(约2毫米),紧密插入一根7厘米长外有绝缘层的铜导线,作为一个电极;另一圆孔直径约1.5厘米,嵌入一橡皮塞,塞的中央打一个孔,紧密装入另一铜导线,作为另一极。两极的铜导线较粗,以不易形变为度。两电极的近端,在圆筒内相隔4厘米,其间连接一条螺旋形2欧姆的电阻丝。当圆筒的盖子盖上后,容器是密封不漏气的。2.学生实验用的低压电源一个。
First, the equipment 1. Take a short iron milk tank (diameter 8.5 cm, height 17 cm), into the cold water, will not leak out, if there is a leakage phenomenon, need to use soldering repair. On the outer surface 6 cm above the bottom of the cylinder, two holes are drilled in the radial direction. One hole has a small diameter (about 2 mm), and a copper conductor with a 7 cm long insulating layer is inserted tightly. The electrode; the other round hole is about 1.5 cm in diameter, embedded in a rubber plug, and a hole is made in the center of the plug, and the other copper wire is tightly packed to serve as the other pole. The copper wires of the two poles are relatively thick and do not easily deform into degrees. The proximal ends of the two electrodes are separated by 4 cm in the cylinder and a spiral 2 ohm resistance wire is connected between them. When the lid of the cylinder is closed, the container is leak tight. 2. The student uses a low-voltage power supply for experimentation.