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resistance law experimental equipment resistance wire ohm demonstration use physics teaching instrument electricity for junior and senior high schools

resistance law experimental equipment resistance wire ohm demonstration use physics teaching instrument electricity for junior and senior high schools

电阻定律实验器材阻丝欧姆演示用初高中物理教学仪器 电

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  • Description

导体的电阻R跟它的长度L成正比，跟它的横截面积S成反比，还跟导体的材料有关系，这个规律就叫电阻定律。

公式：R=ρL/S

 

Update time：20241212163245


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