在电场的学习中,笔者发现有一些物理问题很难解答,在知道答案的前提下也很难解释.深入研讨,本人总结得出此类问题若用整体思维法却能达到灵巧速解的目的.题1 如图1所示,a 为一带正电的上方有小缺口的球形空腔导体,b 为验电器.a、b 相距较远,则下列过程中能使 b 的箔片张开的是 In the study of the electric field, the author found that there are some physical problems that are difficult to answer, and it is difficult to explain under the premise of knowing the answer. In-depth discussion, I concluded that such problems can achieve the purpose of smart quick solutions with the overall thinking method. Problem 1 As shown in Figure 1, a is a positively charged spherical cavity conductor with a small notch above, and b is the electroscope. A, b are far apart, so that the foil of b can be opened in the following process. Yes