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有一些材料制成的电阻,其内部电流与两端外加电压并不成正比(即阻值随外界条件的变化而变化),故它们的伏安特性曲线不是过原点的直线,而是一条不规则的曲线,这些电阻统称为非线性电阻,如热敏电阻、光敏电阻、金属热电阻等等.由于这种电阻的伏安特性曲线是非线性的,故一般很难甚至几乎不可能写出它们伏安特性曲线的解析式.根据这些电阻在一个工作状态下的阻值,也无法获知它们在另一个工作状
There are some materials made of resistance, the internal current and the voltage across the two ends is not proportional to (that is, resistance changes with the external conditions), so their volt-ampere characteristic curve is not a straight line through the origin, but an irregular These resistors are collectively referred to as non-linear resistors, such as thermistors, photoresistors, metal thermal resistors, etc. Since the volt-ampere characteristic curves of such resistors are non-linear, it is generally difficult or almost impossible to write them An analysis of the characteristic curve. According to the resistance of these resistors in a working state, they can not be found in another working shape