对人体来说，一般情况下36V以下的电压是安全的，通过人体的电流等于1毫安时会引起麻的感觉，通过人体的电流 5v 1.25毫安的电压和电流经过人体，长时间对人体有害吗？...
\u7167\u660e\u7535\u8def\u7684\u7535\u538b\u4e3a220\u4f0f\uff1b\u5bf9\u4eba\u4f53\u6765\u8bf4\uff0c\u4e00\u822c\u60c5\u51b5\u4e0b36\u4f0f\u4ee5\u4e0b\u7684\u7535\u538b\u662f\u5b89\u5168\u7684\u3002\u901a\u8fc7\u4eba\u4f53\u7684\u7535\u6d41\u7b49\u4e8e1\u6beb\u5b89\u65f6\u4f1a\u5f15C
\u9996\u5148\uff0c5V\u7684\u4f4e\u7535\u538b\u4e0b\uff0c\u4eba\u4f53\u76ae\u80a4\u7684\u7535\u963b\u6bd4\u8f83\u5927\uff0c\u5927\u7ea6100K\u6b27\u59c6\u5de6\u53f3\uff1b\u4f46\u662f\uff0c\u968f\u7740\u9891\u7387\u548c\u7535\u538b\u7684\u5347\u9ad8\uff0c\u4eba\u4f53\u7684\u7535\u963b\u6709\u53d8\u5316\uff0c\u800c\u4e14\uff0c\u572850Hz\u5de6\u53f3\u7684\u5de5\u9891\u4e0b\uff0c\u4eba\u4f53\u7535\u963b\u8f83\u5c0f\uff0c1K\u6b27\u59c6\u5de6\u53f3\u3002\u5de5\u9891\u7535\u5bf9\u4eba\u4f53\u4f24\u5bb3\u662f\u975e\u5e38\u5927\u7684\uff0c\u6240\u6709\u5bb6\u7528\u7535\u5668\u6709\u6f0f\u7535\u4fdd\u62a4\u5668\u4e00\u8bf4\u3002
\u4f60\u8bf4\u76845V 1.25mA\uff0c\u5e94\u8be5\u662f\u76f4\u6d41\u3002\u5728\u4eba\u4f53\u4e0a\uff0c5V\u7684\u7535\u538b\u6839\u672c\u4ea7\u751f\u4e0d\u4e861.25mA\u7684\u7535\u6d41\uff0c\u9876\u591a\u662f\u5fae\u5b89\u8bb0\u5f97\u7535\u6d41\uff0c\u5bf9\u4eba\u65e0\u788d\u3002
\u4e00\u822c\u6765\u8bf4\uff0c\u4eba\u4f53\u7684\u5b89\u5168\u7535\u538b36V\uff0c\u5b89\u5168\u7535\u6d4110mA\uff0c\u81f4\u6b7b\u7535\u6d4150mA\u3002
I=30mA=0.03A
人体的电阻R=U/I=36/0.03=1200(Ω)
答：略。
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解：R1=U/I1=36V/0.001A=36000Ω
R2=U/I2=36V/0.03A=1200Ω
因此普通人体的电阻应该在1200Ω到36000Ω之间。
=30mA=0.03A
人体的电阻R=U/I=36/0.03=1200(Ω)
36/0.03=1200欧姆
36/0.03=1200欧姆
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