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赫赫,全还给初三物理老师了吧?热的时候电阻大,所以灯经常是刚一点着的时候坏。

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(#334005@0)
2002-1-14 -04:00
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Back To Topic: 初级问题:加拿大100W灯泡的电阻是多少?1000W电炉丝的电阻是多少?(我用数字万用表测出来的是灯泡11欧,电炉45欧,好象不对!看来我是不会用,谁能指点,谢了)

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