通常静电实验多选用指针式验电器检验物体是否带电.但是,由于氖管结构简单使用方便(如图1),现象直观明显,在静电实验中,可以用来判别物体是否带电及带电极性.在真空封闭的玻璃管中充入适量氖气,并加上两个 Normally, the static test uses a needle-type electroscope to test whether the object is charged, however, the neon tube has a simple structure and is easy to use (as shown in Figure 1). The phenomenon is intuitive and obvious. In the electrostatic experiment, it can be used to determine whether the object is charged or not. In a vacuum-filled glass tube filled with an appropriate amount of neon, and add two