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在电学中每当牵扯到电阻的并联问题时,部分同学感到并联电路难以理解。特别是并联电路电阻的计算问题,一是计算麻烦,二是浪费时间,下面有几种理解和估算方法供参考: 一、理解1、在并联电路中,总电阻的倒数等于各并联导体电阻的倒数之和。(1/R=1/R1+1/R2+……1/Rn)。2、在电路中有n个相同的电阻(r)并联,总电阻(R)等于其中一个电阻的n分之一。(R=r/n)
When the parallel problem of resistance was involved in electricity, some students felt that the parallel circuit was difficult to understand. In particular, the calculation of the parallel circuit resistance is one of calculation troubles and the second is a waste of time. There are several ways to understand and estimate the following for reference: 1. Understanding that in a parallel circuit, the reciprocal of the total resistance is equal to the resistance of each parallel conductor. The sum of the countdown. (1/R=1/R1+1/R2+...1/Rn). 2. In the circuit, there are n identical resistors (r) connected in parallel, and the total resistance (R) is equal to one-nth of one of the resistors. (R=r/n)