1．复习资料上有这样一道习题:相距充分远的半径相同(r)的金屑小球A和B,用一条充分长导线相连,它们都带上+Q_0/2的电量。现把小球A放入一不带电金属球壳(内外半径分别为R_1和R_2),如图1所示,分析小球A从放入到与球壳内壁接触,小球A和B的电量变化。这道题我们运用大学物理知识在几个特殊位置上给予定量解。 1. There is an exercise in the review material: Gold pellets A and B of the same radius (r), which are far apart, are connected by a sufficiently long wire, both of which carry the power of +Q_0/2. The ball A is now put into an uncharged metal ball shell (inside and outside radius R_1 and R_2, respectively), as shown in Figure 1, from the analysis of the ball A from the contact with the inner surface of the ball shell, the ball A and B Variety. In this question, we use the knowledge of university physics to give quantitative solutions in several special positions.