LKEB-4030电阻器LKEB4030面价
LKEB-4030电阻器LKEB4030面价
LKEB-4030电阻器LKEB4030面价
LKEB-4030电阻器LKEB4030说明书
LKEB-4030电阻器LKEB4030接线图
LKEB-4030电阻器LKEB4030电路板
LKEB-4030电阻器（Resistor）在日常生活中一般直接称为电阻。是一个限流元件，将电阻接在电路中后，电阻器的阻值是固定的一般是两个引脚，它可限制通过它所连支路的电流大小。阻值不能改变的称为固定电阻器。
LKEB-4030阻值可变的称为电位器或可变电阻器。理想的电阻器是线性的，即通过电阻器的瞬时电流与外加瞬时电压成正比。用于分压的可变电阻器。在裸露的电阻体上，紧压着一至两个可移金属触点。触点位置确定电阻体任一端与触点间的阻值。
LKEB-4030端电压与电流有确定函数关系，体现电能转化为其他形式能力的二端器件，用字母R来表示，单位为欧姆Ω。实际器件如灯泡，电热丝，电阻器等均可表示为电阻器元件。
LKEB-4030电阻元件的电阻值大小一般与温度，材料，长度，还有横截面积有关，衡量电阻受温度影响大小的物理量是温度系数，其定义为温度每升高1℃时电阻值发生变化的百分数。电阻的主要物理特征是变电能为热能，也可说它是一个耗能元件，电流经过它就产生内能。电阻在电路中通常起分压、分流的作用。对信号来说，交流与直流信号都可以通过电阻。
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