maychang

sky999 published on 2022-12-9 21:25

[Do you need to connect a multimeter to a special part and measure the ground?]

A multimeter cannot measure static electricity. Regardless of voltage or current, the multimeter will at most flash. If it is a pointer-type multimeter, you may not be able to observe even the slightest vibration of the pointer.

Honghuzaitian

sky999 posted on 2022-12-9 19:32 I have never thought about this question, where is the static electricity in the body stored?

It is the accumulation of local charges. If all charges can be transferred, there will be no static electricity.

hustjtj0806

Discharge, which is static electricity transfer, will only occur when the human body comes into contact with metal. There will not be a large amount of violent and rapid static electricity transfer when it comes into direct contact with an insulator, so you will not be electrocuted. There is also static electricity transfer, but it is local static electricity and the amount is small.

吾妻思萌

I guess urine is charged? If urine falls on your hand, your hand will also be charged.

chunyang

sky999 posted on 2022-12-9 19:32 I have never thought about this question, where is the static electricity in the body stored?

Static electricity charges are distributed on the surface of a conductor, as we learned in high school physics.

chunyang

sky999 posted on 2022-12-9 19:34 Yes, I get shocked once every morning now, but not at other times. It's been about a month now. I get shocked every morning when I touch the faucet. Now I...

It is entirely possible for friction between clothing and bedding and bedding materials to generate static electricity charges.

chunyang

sky999 published on 2022-12-9 21:25

A multimeter cannot measure static electricity. To know how to measure it, recall your high school physics course.

As for the test location, any location on the surface of a static-carrying conductor is equivalent. Apparently there is no such thing as a special location. It seems that the relevant knowledge has been handed down to middle school teachers. Are there any incidental interests?

chunyang

Honghuzaitian posted on 2022-12-10 12:30 It is the local charge accumulation. If all the charges can be transferred, there will be no static electricity

That's not just a local problem. The human body is a conductive whole. If it carries static electricity, the charge will be evenly distributed on the body surface.

chunyang

Azuma Simeng posted on 2022-12-12 15:10 I guess urine is charged? If you urinate on your hand, your hand will also be charged

Another person who has returned high school physics knowledge to the teacher. Let me ask you, is there any interest attached?

chunyang

hustjtj0806 Published on 2022-12-12 07:22 Discharge will only occur when the human body comes into contact with metal, which is the transfer of static electricity. There will not be a large amount of violent and rapid static electricity transfer when it comes into direct contact with an insulator, so you will not be electrocuted, ...

Discharge does not necessarily occur when in contact with metal; any conductor can do the job, such as contact with natural water, other people's bodies, etc.

okhxyyo

If you get shocked every morning, have you ever thought that it might have something to do with your quilt or sheets?

tomas_li

maychang posted on 2022-12-8 19:46 [It is possible to walk 1 or 2 steps, but is the static electricity from these 1 or 2 steps enough to shock people? ? ] It is entirely possible.

Pull up your pants. Since the waistband may contain chemical fiber materials, a little friction will generate static electricity. I strongly recommend that you do not wear pants containing chemical fiber materials in the future.

maychang

tomas_li posted on 2023-1-12 18:47 Pull up your pants. Since the waistband may contain chemical fiber materials, a little friction will generate static electricity. I strongly recommend that you do not wear pants containing chemical fiber materials in the future...

[It is strongly recommended that the OP should not wear pants containing chemical fiber materials in the future]

Not only chemical fibers, wool, linen, etc. are also prone to generating static electricity.

chunyang

A few days ago, I reproduced this phenomenon and conducted repeated experiments and tests to figure out the cause.

I occasionally found that static electricity was easily generated when I matched clothes, so I remembered this post and started experimenting immediately.

Clothing that is prone to generating static electricity is a thickened and warm synthetic sportswear. When paired with a down jacket, it is easy to generate static electricity. Just put on and take off the down jacket quickly.

Because I am very sensitive to static electricity shock, I made a special discharge resistor and hung it on my key ring for a long time, which is just right for discharge experiments.

The experiment was conducted at night because static electricity discharge produces sparks that are easy to observe.

I immersed a short section of single-strand wire in the accumulated water in the toilet drain as a discharge contact. The other discharge point was the faucet. The distance between the toilet and the faucet was about 1 meter.

After repeatedly putting on and taking off my down jacket and discharging the faucet to confirm that it was reliably charged, I put on and took off my down jacket again and then discharged the wire immersed in the toilet water. No sparks were observed. Then I discharged the faucet and indeed observed sparks. This confirmed that the phenomenon encountered by the original poster does exist!

This phenomenon was confirmed many times through repeated experiments.

chunyang

Cause Analysis:

The bathrooms of modern high-rise buildings all have waterproof layers, and the sewers are PVC plastic pipes. When the ground, toilet, sewer, etc. are all in a dry state, the water at the elbow of the toilet can accommodate very limited static electricity, so no obvious discharge phenomenon is observed for the toilet water. The water supply is in a pressurized state. Although the pipes are also likely to be insulated (most of them are PVC pipes), the pressurized water in the pipes is continuous, which is completely different from the water in the sewer that flows by natural gravity. The former is continuous and the latter is discontinuous. A large amount of continuous water can absorb a large amount of static electricity, so the static electricity discharge is obvious, but this is not the case with sewers, unless the pipes are in a wet state.

Thus, the mystery was solved, and I suddenly remembered CCTV's "Approaching Science". If this was filmed in the last episode...

Anyway, the script is already there.

maychang

chunyang posted on 2023-2-7 16:21 Cause analysis: The bathrooms in modern high-rise buildings have waterproof layers, and the sewers are PVC plastic pipes. The ground, toilets, sewers, etc. are all in a dry state...

If the water in the pipe is continuous, it must be connected to the ground through the pipe. Although the pipes entering the room are often made of PVC, the thicker pipes (main pipes) are often iron pipes. The water pumps to the water pump station are cast iron pumps, and the pumps must be installed on a reinforced concrete base.

chunyang

maychang posted on 2023-2-7 16:35 If the water in the pipe is continuous, it will definitely connect to the ground through the pipe. Although the pipes entering the house are often made of PVC, the thicker pipes (main pipes) ...

This is indeed the case, but as long as the water in the water pipes in the building is continuous, even if the water inlet pipe at the upper level is stopped and drained, the remaining water in the water pipes in the building is able to accommodate electrostatic charges sufficiently to observe obvious discharge phenomena.

oniuzhang

Triboelectricity

The toilet cannot be insulated. There is static electricity when walking one or two steps. Is it possible that the static electricity from these one or two steps is enough to shock people? ?

maychang

oniuzhang posted on 2023-2-8 11:49 It is impossible for a friction-generated toilet to be insulated. There is static electricity when walking one or two steps. Is the static electricity generated by these one or two steps enough to shock people? ?

【Frictional electricity】

It is wrong to say that friction generates electricity. The correct statement is that contact generates electricity. Friction only increases the contact area between two objects.

Andy_zhang119

Because hands carry static electricity, when you touch the faucet with your hands, the faucet is a conductor, and the static electricity on your hands is transferred to the faucet.