功率绕线电阻是用电阻材料制成的、有一定结构形式、能在电路中起限制电流通过作用的二端电子元件。阻值不能改变的称为固定电阻器。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。一些特殊电阻器，如热敏电阻器、压敏电阻器和敏感元件，其电压与电流的关系是非线性的。
Power wound resistance is a two terminal electronic component made of resistance material, which has a certain structure and can limit the current passing through the circuit. A fixed resistor is one whose resistance cannot be changed. Variable resistance is called potentiometer or variable resistor. The ideal resistor is linear, that is, the instantaneous current passing through the resistor is proportional to the applied instantaneous voltage. Some special resistors, such as thermistors, varistors and sensitive elements, have nonlinear relationship between voltage and current.
电阻器是电子电路中应用数量最多的元件，通常按功率和阻值形成不同系列，供电路设计者选用。电阻器在电路中主要用来调节泥杆 保定古筝 塑料增韧剂 拱形护坡模具 保定空调维修  托辊生产线和稳定电流与电压，可作为分流器和分压器，也可作电路匹配负载。
Resistor is the most widely used component in electronic circuit. It usually forms different series according to power and resistance value for circuit designer to choose. The resistor is mainly used to regulate and stabilize the current and voltage in the circuit. It can be used as a shunt and voltage divider, or as a circuit matching load.