对于人体的安全电压为多少?
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http://baike.baidu.com/view/1014228.htm
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国家规定安全电压是38V,它是根据一般人群的人体电阻(普遍大于1K)计算得到的,实践证明,人的心脏通过电流40mA以上,就能致人死亡,U=I*R,所以,某人如果电阻特别小,38V也会电死他。
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