Although water is a poor conductor of electricity, there is no such thing as pure water in nature, unless it is distilled it is still a conductor {in fact, even if it is distilled, it is conductive, the water will ionize. }, and people themselves are also drivers. , when you touch a charged object, it is equivalent to connecting the charged object to the ground. The domestic circuit voltage is generally 220 V. At this time, there is a potential difference between the ground. and the charged object, and a current is generated. It flows from the earth to the charged object. When current passes through the human body, an electric current is generated. By the way, people are still conductive without water and will still experience electric shock, so don't touch low voltage charged objects and try to stay away from high voltage charged objects. When the voltage is too high, arc discharge will occur. , and you will receive un electric shock if you do not touch the charged objects
< p>Remember to accept it, thank you?(?ω?)?Electric shock accidents may occur.
Purified water is also conductive, but its conductivity is very low. So of course, tap water is more conductive. The water from the water plant is only disinfected, sterilized and cleaned of sediment and organic sediment. cannot remove anions, cations and small organic and inorganic molecules not precipitated in water. Pure water itself is an extremely weak electrolyte, a water molecule will be ionized. This is a prerequisite for conductivity. cannot be ionized cannot conduct electricity. To do a conductivity experiment, there must be three conditions: (1) a conductive battery, preferably a U-shaped tube (2) two electrodes and an external wire plus an ammeter (3) a DC power supply. Food. WormSeed the conductive solution into the conductive battery, connect two electrodes in parallel and connect the power supply. As long as you see the pointer in the ammeter oscillating, this will prove that the solution can conduct electricity if you use it. pure water The test needs to add some substances that improve conductivity, such as sodium hydroxide.
In general, there are two common situations in which an electric shock causes current to flow through the heart. The first is when the left hand touches the heart. a charged object or power source, and the current The left hand passes through the heart and leads to the ground; the second is that the left and right hands touch the positive and negative poles of the power supply respectively, so that the current flows through the heart.
Electric shock mainly refers to the current flowing through the human body, causing damage to the functions of the body.human rps. The sensation produced by the human body to the current flowing through the body varies depending on the size of the current and the degree of damage is also different.
(1) When the current of power frequency 1mA or DC 5mA passes through the human body, the human body feels numb, tingling and painful.
(2) When 20-50mA power frequency or 80mA DC current passes through the human body, people will feel paralysis, spasms, tingling, increased blood pressure and breathing difficulties. If you fail to get rid of the power supply, your life will be in danger.
(3) When a current of more than 100 mA passes through the human body, the person will have difficulty breathing and the heart will stop beating.
Generally speaking, when an industrial frequency current less than 10 mA and a direct current less than 50 mA pass through the human body, the persYou can get rid of the power supply, so the risk is not great.