電阻的作用就是降壓,你這電線電阻大了另一端電壓必然就低了. 就一基本的串聯電路的歐姆定律:每段電路上的電壓之和等於總電壓,V= I R。
電阻的作用就是降壓,你這電線電阻大了另一端電壓必然就低了. 就一基本的串聯電路的歐姆定律:每段電路上的電壓之和等於總電壓,V= I R。
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