供应CEFRB船用扁电缆

关键在于带电物体与人体间的电势差，还有电源所能提供的能量大小，这两个因素决定了你是否触电。
The key is the potential difference between the charged object and the human body, and the amount of energy the power supply can provide. These two factors determine whether you are electrified or not.
在电学中，有两个重要概念——电势和电势差。
In electricity, there are two important concepts -- electric potential and potential difference.
电势：指我们定义一个零电位点，然后某处相对于零电位的电势差，即为该点的电势；
Potential: We define a zero potential point, and then the potential difference relative to zero potential somewhere, that is, the potential of that point;
电势差：两点之间的电势之差；
Potential difference: the difference between two potentials.
为什么火线电人但是零线不电人的原因
Why the fire line is electricity, but the reason why the line is not electricity?
电势差就是我们平常说的电压，生活中几乎一切用电设备，都是以大地作为零电位，我们人体直接行走在大地上，所以人体基本也是零电位。
Potential difference is what we usually say voltage, in life almost all electrical equipment, are to the earth as zero potential, we walk directly on the ground, so the human body is basically zero potential.
对于直流电和交流电，零线的电势基本和大地相等，所以零线相对于人体的电压几乎为零，人体的电阻是很大，所以人触摸零线时，根据欧姆定律I=U/R，通过人体的电流就很小，自然就不会电人。
For DC and AC, the zero-line potential is basically the same as the earth, so the zero-line voltage relative to the human body is almost zero, the resistance of the human body is very large, so when people touch the zero-line, according to Ohm's law I = U / R, the current through the human body is very small, naturally no electrician.
为什么火线电人但是零线不电人的原因
Why the fire line is electricity, but the reason why the line is not electricity?
但火线的电势是很高的，一般交流电相对于零线的电压较高是220v，也就是说人体相对于火线的电压较高有220v，人一旦触摸火线，通过人体的电流将非常大，就会导致触电事故。
But the electric potential of the fire line is very high, generally the highest voltage of alternating current relative to the zero line is 220v, that is to say, the highest voltage of the human body relative to the fire line is 220v, once people touch the fire line, the current through the human body will be very large, it will lead to electric shock accident.
说白了，无论直流电还是交流电，就是火线相对于人体的电压很高，零线相对于人体几乎没电压，这就是火线电人，但是零线不电人的主要原因。
To put it plainly, whether DC or AC, is the high voltage of the fire wire relative to the human body, zero line relative to the human body almost no voltage, this is the main reason for the fire wire man, but zero line is not electrified.
为什么火线电人但是零线不电人的原因
CEFRB船用扁电缆Why the fire line is electricity, but the reason why the line is not electricity?
另外，有电势差还不够，还得看电源能提供的能量大小，比如我们冬天穿的毛衣造成的静电电压高达上千伏特，但是静电的能量非常微弱，通过人体的电流瞬间衰减掉，也不会对人体造成伤害。
In addition, the potential difference is not enough, but also depends on the power supply can provide the size of energy, for example, we wear sweaters in winter caused by static electricity voltage as high as 1000 volts, but the energy of static electricity is very weak, through the current of the human body instantaneous decay, will not cause harm to the human body.
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重点词汇CEFRB船用扁电缆
重点词汇
电势差electric potential difference; potential difference
触电get an electric shock; electric shock
电学electrics; electricity; electrology
零电位zero potential
某处somewhere
火线battle line; firing line; live wire; caustic line; front line
用电设备power consumption equipment
直流电direct current (dc); continuous current; DC
交流电alternating current (AC; alternating current
基本和elementary sum; fundamental sum