论文部分内容阅读
在初中物理习题中,特别是选择题和填空题中,经常遇到求解两个或三个物理量之间的比例问题。这类习题看似简单,但多数学生容易解错,甚至感到无从下手。为此我仔细分析了解题过程,提出了用表格解决此类问题的方法,大大降低了解题的错误率,提高了解题效率。为了更清楚地了解此解法的优点和应用方法,现结合实例与其他方法进行比较。例1、两电阻R1、R2接在各自电路中,当U1∶U2=2∶1、I1∶I2=4∶3时,两电阻R1、R2阻值之比等于()A.3∶2 B.2∶3 C.8∶3 D.3∶8
In junior high school physics exercises, especially multiple choice and fill in the blank, often encounter the problem of solving the ratio between two or three physical quantities. Such exercises may seem simple, but most students are prone to error and may even feel frustrated. To this end, I carefully analyzed the process of solving the problem, put forward the method of using tables to solve such problems, greatly reducing the error rate of solving problems and improving the efficiency of solving problems. In order to more clearly understand the advantages of this solution and application methods, the examples are compared with other methods. Example 1, the two resistors R1, R2 connected to their respective circuits, when U1: U2 = 2: 1, I1: I2 = 4: 3, the resistance of the two resistors R1, R2 ratio is equal to .2: 3 C.8: 3 D.3: 8