有些物理问题 ,运用物理方法进行定性分析较难得到令人信服的结论 ,而借用数学手段进行定量计算 ,则不仅推理规范严密 ,而且结果正确无误 ,尤其是在提倡“重视结合”、“重视学科间的相互渗透”的今天更具有其现实意义 .图 1　例题图例　如图 1的电路 ,总电压保持不变 ,滑动变 Some physical problems, the use of physical methods for qualitative analysis is more difficult to obtain convincing conclusions, and the use of mathematical means for quantitative calculations, not only reasoning and strict norms, and the result is correct, especially in promoting “emphasis on integration”, “pay attention to discipline Today’s mutual penetration ”has more practical significance. Figure 1 Example diagram such as the circuit of Figure 1, the total voltage remains unchanged, sliding change