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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)
Last Updated: 2002-1-14
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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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