论文部分内容阅读
并联电路中电流的分配与电阻成反比.若已知干路中的电流和两个电阻的阻值或三个电阻的阻值(或比值),求通过各支路的电流,学生往往感到为难,束手无策.即使会运算,有时计算量大、繁琐、且费时易错,现介绍一种简便解法. 以三个电阻并联为例,因为电流与电阻成反比,而与电阻的倒数(电导)成正比,所以I_1∶I_2∶I_3=1/(R_1)∶1/(R_2)∶1/(R_3),而I_1+I_2+I_3=I,首先算出通过阻值大的电阻的电流,不妨设
The current distribution in the parallel circuit is inversely proportional to the resistance. If the current in the trunk and the resistance of the two resistors or the resistance (or ratio) of the three resistors is known, the students often find it difficult to find the current through each branch. No calculations are possible. Even if calculations are performed, sometimes the calculations are large, cumbersome, and time-consuming and error-prone, a simple solution is introduced. Take three resistors in parallel as an example, because the current is inversely proportional to the resistance, and the reciprocal of the resistance (conductance) becomes Proportional, so I_1:I_2:I_3=1/(R_1):1/(R_2):1/(R_3), and I_1+I_2+I_3=I, first calculate the resistance of the current through the large resistance, it may be