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应该是这样的原因吧,电阻在发热时和冷态不一样。不过我记得是热电阻小,那结论就会倒过来。。。反正你不能用冷态下的电阻算。

cocotea (可可茶养兔子)
(#333956@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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