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电学黑箱的种类很多,这里仅就电阻型黑箱问题作出解析,以开阔你的眼界.例1现有3个阻值均为R的电阻及导线,它们分别与图1甲标有A、B、C、D的有关接线柱相连,经测试发现:(a)接线柱A与B间的阻值等于3R;(b)接线柱B与C间的阻值等于R;(c)接线柱C与D间的阻值等于0;(d)接线柱A与D间的阻
There are many kinds of electrical black boxes. Here, we only analyze the problem of resistive black boxes to broaden your horizons. Example 1 There are three resistors and wires that each have a resistance value of R. They are labeled A and B in Figure 1. The relevant terminals of C and D are connected and tested and found: (a) The resistance between terminals A and B is equal to 3R; (b) The resistance between terminals B and C is equal to R; (c) Terminal C The resistance between D is equal to 0; (d) The resistance between terminals A and D