Anatomy of Electrocution
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- čas přidán 12. 08. 2022
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Correction: I stated ventricular defibrillation, when the correct term for irregular heart beating is ventricular fibrillation.
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Nah
I'd love to but, when I go to that link, I get "403 Forbidden."
You made a mistake when talking about what DC does, what you described is actually ventricular fibrillation and is what happens when AC passes through the heart. By contrast a defibrillator is a device which uses DC to stop the heart thus stopping the chaotic rhythm of VFib (Works on V-Tach too). This is actually where the device gets it's name because it stops fibrillation (Also works on V-Tach rhythms too) thus restoring the heart to a state of asystole from which the hearts pacemaker cells can hopefully kick in and restore a normal sinus rhythm. So for your DC example it should have shown the heart contracting fully for the duration of the shock since that is what happens and then it hopefully starts beating again when the current stops and the heart relaxes. Hopefully being for the obvious reason that the thing that put it in that state in the first place may also have damaged it beyond recovery.
@@user-of4iq4vn9mAngel2Jeanie the cap electrode steam-cooks the brain, and the skull explodes. the reason a face hood is used. very effective. boomers declared it as "inhumane" for murders, rapists, and torturers.
@@em1osmurf I believe it is very probably the worst way to die, now. It would be like setting all your organs inside on fire and melting forever; your tongue your brain your liver kidneys heart and probabgly last through and through even through death it would be like being in hell forever and cooked all through your death in hell.
My dad is an electrician and he had a "no let go" shock when someone ignored the tag on the breaker and turned on the wires he was working on. He said he knew what was happening and kicked the ladder from under him which broke him from the wire and saved his life. Unfortunately the electricity damaged his heart and he has to take heart medication and routinely needs to get his heart checked for the rest of his life, but at least he's still alive!
did he sue the idiot who turned the breaker on?
Good Lord!
@@kenzo_1172 why would he ? It wasnt intentional
This is why LOCKOUT, TAG OUT is a must.
@@sacha_msky "[...] when someone ignored the tag on the breaker [...]" Intentional or not, the person ignored a tag that is there to warn others about the maintenance!
This guy just explained resistance better than any physics teacher I've ever had
Wow, thank you!
For real tho
That'll change when you get your electrical engineering degree
CZcams shows up the uselessness of public school.
@Adam Walker paying attention in class is always an option. So are asking questions
*Correction:*
The term is Ventricular "Fibrillation" and not defibrillation. We doctors commonly call it as V. Fib.
Fibrillation is similar to the word vibration or irregular contraction which is not a normal contraction of heart leading to it's normal physiology.
Hence, "de-fibrillators" are machines used to stop the fibrillations or vibrations and contractions are induced through CPR.
Thanks for the clarification.
V-fib, De-fib. Hopefully the D-fib works and the heart restarts. Not as often as the TV would lead you to believe.
Exactly. That is why the 'shocker' you see on TV is not normally to START a Heart. As per the name a Defibrillator is designed to STOP the Heart which is in Ventricular Fibrillation in the hope it will re start properly. A 'De Fib' machine MAY start the Heart if STOPPED, but is less useful than you may think. A massive thump in the middle of the Chest followed by CPR is a better shot.
A defibrillator neither "restarts" a "stopped" heart, nor does it provide energy to keep it going. It is intended to terminate certain life threatening arrhythmias.
Thank you.
Seeing all this scared the hell out of me, i'm truly shocked
How dare….
Good pun.
Hardy har har.
bud um tssssss
Bro. you are everywhere.
My paternal granddad was an electrician. I remember him having us four grandchildren hold hands in tandem: Grandchild #1 would touch the radiator and grandchild #4 would hold Grandpa's hand. Then with his other hand, Grandpa would insert the 'blade' of his nail clippers into the "hot" (-) hole of the nearest receptacle/outlet so we could all feel the tingly current, until grandchild #1 (usually me) chickened out and let go of the radiator pipe, which would break the circuit and the tingling would stop. Fun times! until Mom found out and all the sudden we had a different baby sitter.
A real man your granddad was! Without such people, the world would be full of snowflakes.
We had a science teacher that invited the class to form a circuit by holding hands. One student would hold the sparkplug lead to a lawnmower engine magneto and the other would touch the crankcase after which he would pull the starter rope and the shock would travel around the room. Good times.
I often wondered why you can pick up Radio Free Europe on your teeth's fillings! It all makes sense now.
Lmfao.
😂😂😂😂😂😂😂😂sure your mom had to replace him
I almost died today from being electrocuted, 220v ac on a 2 Amp refrigeration compressor, I grounded a wire, and myself to the unit and got stuck there for about 3 seconds until I fell back off the ladder 1.5m to the floor.. I chilled for about 10 minutes and started feeling terrible, I could barely feel my heart beat and the muscles in my arms and hands totally contracted like I was having a seizure, I also felt like I was going into cardiac arrest so my work colleagues rushed me off to the hospital while giving me CPR, what a day.. I'm so happy to still be here, all I could think about is how much it would destroy my dad if I died, I think that's what saved me
🙏🙏🙏
You should never perform CPR on an adult who has a pulse…. Just so you know (hopefully not for next time though!) But yeah if you ever run into a situation like that with someone else, do not perform CPR on someone with a pulse. The only exception is if it’s a prepubescent pediatric patient with a heart rate of less than 60.
"You can come into work tomorrow, right?"
@@alexlabs4858 interesting, thank you for the heads up, I had no idea what was happening to me though and I was not ready to die lol
@@ItchyDingo It’s all good, it happens all the time! It’s not harmful to your heart or anything, the thing is if someone is doing CPR correctly they can break ribs while doing it so it’s best to avoid a broken rib unless it’s absolutely necessary! Glad you’re still kicking.
It's worth mentioning that, despite changes in EM field spreading with the speed of light (including changes when an electrical circuit is connected), electrons themselves are moving relatively slowly, with a speed of about 0.5cm per second.
Per hour*
Per second ?
I didn't get that
Can you recommend what to Google to research it further?
@@thomaz.869 It's true, I remember my highschool science teacher telling us this. The reason why the electric current works is because the electrons are in the material from start to finish
@@thomaz.869 Googling "drift velocity" should help
Wow, so the entire central nervous system is shut down immediately after electricity is turned on in the electric chair. Meaning that the person receiving it cannot feel anything else but the initial shock.
This also means that the first shock is to shut you down, the next is to toast your insides and the last one I have no clue why it would be applied... Maybe just to make sure you are dead by that point?
Amazing... And terrifying...
damn those criminals going quick
if only they can feel more pain.
If the electric chair is properly used. There have been cases where people weren't knocked out and were cooked alive for the full duration in the early days.
@@zchen27 I misread that as “cooked alive for the full duration in eleven days”. Now THAT would have been a show.
@@zchen27 Yep, it was even portrayed that way in the movie "The Green Mile" when the sponge wasn't soaked in the salt water solution.
@@zchen27 i remember it in rdr 2 side mission
Poor fella begging arthur to kill him
I’m a former Weapons & Electronics Engineer in the UK Armed Forces. I remember that in the first lesson in my training, my instructor said this, “Electricity isn’t dangerous, until you forget that it is”. This one phrase has stuck with me my whole life. Respect it, and you will be okay. Get complacent, and it will bite you in a heartbeat!!
As the earlier version of my comment appears to have gained some criticism, I have edited it to remove the offending phrase!
Pretty sure a truer phrase has been said in the history of mankind
@@Redsky973 😂 Agreed.
@@Redsky973 You might have just said it
Gary...
What do you say to the people that have been struck by lightening?
What's the offending phrase?
As an Electrician I can say with confidence that electricity traveling from one hand across the heart to the other hand really hurts, you really feel your muscles tensing 50 times a second fortunately I have habits to avoid a death grip and have never been shocked for much more than a second
I have been shocked by 120V household voltage more times than I can count. Yeah, it's not pleasant but it's tolerable. Just don't be standing in water.
Made the mistake of touching both ends of a 4' fluorescent bulb one time, ouch!
From Europe, perchance? Much of Europe ueses 50Hz power, USA and Canada at least, use 60Hz. In some ways 60HZ is more dangerous because it can synch with the heart, and effectively stop it. 50 HZ does not synch so well.
230v from my house and 30000+v from my motorcycle, that was hard. 😂
Is avoiding long term damage from shocks possible as an electrician? I want to get into it but I don’t want people to pressure me into doing the job faster by skipping safety measures and not wearing all the PPE
As an electrician, I have experienced "no let go". I had three fingers burned just like touching a hot frying pan. I was lucky enough to fall off of the contact. As an apprentice I had no business doing what it was I was doing. I am very safety conscious today. LOTO and proper PPE always.
what do you feel in a no let go situation? any pain? itching? or nothing?
I’m considering it for my career but I’m terrified of long term damage to my body. Even small shocks can cause heart issues. If someone wanted to stay safe by wearing PPE and taking time to check safety, is this a good career or is there a rush to get things done fast and people won’t like you if you do things properly?
@@zmba6924 there is no pain. I experienced a no let go shock as a child when I was between 6-8. I was looking for something in my garage climbed the table and grabbed a metal chain to turn the light on turns out that chain had an electrical current running through it. When I touched the metal wire my had fully grabbed onto it tight. It’s essentially an involuntary hand movement. You feel the current vibrating and flowing through your body and a buzz sound. You also feel your hands and arms get really hot to the point of burning. it’s hard to explain but you just feel a strong force flowing through your body. It tingles and makes your heart beat fast and feel a sense of impending doom. I don't know how I survived but that moment felt like minutes when it was probably seconds. I panicked and tried to pull my hand bit didn't work. Once I started feeling my heart pound faster for some reason I was able to yank my hand downwards and free myself and run away from the garage I told my dad like a week later. I truly feel that day that god saved me because that current had a strong grip on me,.
@@Justin-jy6fujoin the IBEW. im an apprentice in the IBEW currently, a little over halfway done. Im making more money than i know what to do with. The ibew will train you well on being an electrician, including safety. All the contractors ive worked for put an emphasis on safety, and almost all jobsites ive been on have not been so rushed that there was no time for lockout tagout. Working on live circuits is rare and discouraged, usuallly youll run into this in hospitals where turning power off can cost lives. Also, being unionized, if somehow you ever do come across a foreman on a jobsite who doesnt want you locking out a circuit, put your tools down and call the school (since youre gonna start as an apprentice) and tell the training director whats up. If the contractor lays you off for it, youll have another job in no time because the union hall will send you to a new contractor. I never worry about job security. Basically where im going with this is you wont have to worry about it. Most cases of people being shocked are because they play fast and loose with their safety and dont bother to test or lockout before working, not because foremen are forcing you deliberately into dangerous situations. If you want honest advice, if you are mechanically inclined or have worked in another trade before, and electrical interests you, then theres no better way than the IBEW and the opportunities and money are literally endless. Our package here in no mans land in the midwest is over 65 dollars an hour. Dont see many people making this kind of money.
I had that happen to me also when I was a kid but I did not get any burns. I went to open the car door and could not let go of it--scary. My dad was doing something I guess with the car battery maybe
At 12:25 there is a slight error. 60 Hz means 60 complete cycles per second. That is 60 positave and 60 Negative parts of the wave. Totalling the electricity starting and stopping 120 times per second.
@@assalaholiday the us power grid is 60Hz not 1Hz
@@assalaholiday 1 cycle includes the positive and negative phase. Positive becomes negative when it goes through 0 and vice versa. So, for 60Hz the current goes to zero 120 times per second.
@@assalaholiday No, you are wrong.
"there is a slight error" lol - the whole video is full of inaccuracies and obviously made by someone who has no knowledge about electricity beyond watching other CZcams videos.
@@graealex i.e. milliamps. I was like "What is this guy talking about?" LOL Heck I'll take the electric chair any day with that kind of power...and be seenin' ya next week at the local tavern for a drink or two.
My Dad is a handyman by trade and a consummate do it yourselfer, but he never messed with electricity. He’d fix most anything in the house, but when we had electrical issues, he always hired a professional.
Found the electrician.
That's a smart man right there.
My dad is an electrical engineer. He still has called an electrician to get electrical work done at our house. He doesn’t have much experience actually installing and servicing equipment.
My dad is an electrical engineer. He still has called an electrician to get electrical work done at our house. He doesn’t have much experience actually installing and servicing equipment.
My dad is an electrical engineer. He still has called an electrician to get electrical work done at our house. He doesn’t have much experience actually installing and servicing equipment.
Dude explained it better than any teacher I ever had lmao. I really like the water analogy.
I hope you know this guy read it right
Like any analogy it gives you a completely false idea.
Muscle contraction due electricity is something my dad taught me when I was 4. He taught me to (only if there is no other way) to check surface of potentially electrified object with outer side of palm or finger.
What outerside
@@hungry_khid1007 Perhaps with the top of a hand and/or finger.
@@hungry_khid1007the back of ur hand
Yeah no dont use a finger even that can wrap around if you aren't carful
@@geniusdrummer643 In one of his physics of electricity classes, my physics teacher would plug in his demonstration hot dog and touch it with the back of his finger. He told me that if you were to touch something electrically energized, the pull factor would make your hand contract away from the electric current.
A few nuances about electricity
While the model of electrons moving in a straight line through the wire is useful, in reality they are moving in random directions with a relatively miniscule drift velocity caused by the electric field. Veritasium's video explains it well if you want to learn more: czcams.com/video/oI_X2cMHNe0/video.html
"Rubber has a resistance of 10 -100 MOhms"
Particular objects have a resistance, the way materials are measured is with resistivity. The formula for resistivity is: ρ = R(A/ℓ), resistivity equals resistance times cross-sectional area divided by length. The units of resistivity is simplified to Ohms*Meters but it is really Ohms per unit of Length per unit^2 of Cross-Sectional Area.
For example, if an object had a cross-sectional area of 1 cm^2, a length of 1 cm, and a resistance of 100 ohms, that material would have a resistivity of R(A/ℓ) => 100(1/1) = 100 ohm-meters. An object of the same material with a cross-sectional area of 1 cm^2 and a length of 2 cm would have a resistance of ρ/(A/ℓ) => 100/(1/2) = 200 ohms.
"When electricity passes through your skin, the high amount of resistance generates heat"
For an ideal voltage source, higher resistance actually means there is less power P = V^2/R. Hence why electrical workers wear rubber gloves. However in real life, voltage sources have a source resistance so as the load resistance becomes smaller, the power will peak then get smaller(en.wikipedia.org/wiki/Maximum_power_transfer_theorem ). Adding the sponge to the prisoner's head decreases the resistance and actually results in a greater power transfer. The reason the sponge stops burns is because water has a high specific heat capacity and will reach a lower temperature than bare skin despite absorbing more energy.
"This means the current would be turning on and off 60 times per second"
It would be 120 times per second. In the flickering lightbulb, the times when it is on are the peaks and troughs of the sine wave, when electrons are moving fastest in either direction. The times when it is off are the inflection points, when the electrons are still.
Don’t forget to put m^2 and m in the equation. It’s Ohm meters: for the example, it means that the resistivity is: 100(0,0001/0,01)= 1 Ohm meter.
If we go to 2 centimeters, then it’s: 100/(0,0001/0,02)= 200 Ohms.
Also, are you okay to say that while voltage is necessary for current, it doesn’t mean that you have to have a high voltage to have a high current ? The only thing bugging me is with U=RI. How does it work when you change the medium. For example, when it goes from your skin to your nerves. Is U staying constant and I changing to match it or is it the other way around ?
@@Hultraman You're right, what I had was Ohm Centimeters:
100 Ohms (1 cm^2 / 1 cm) = 100 Ohms * (1 cm) = 100 Ohm cm * (1 m / 100 cm) = 1 Ohm Meter
1 Ohm m / (1 cm^2 / 2 cm) = 1 Ohm m / (0.5 cm) = 1 Ohm m / (.0005 m) = 200 Ohms
A lot of great details that are 100% unnecessary for the video. Still useful knowledge though 😉
I think you got something wrong there.
The reason, why the high resistance of your skin, will make it get very hot,is that the rest of your body has got lower resistance. And thus your whole body restistance is almoust only set by your skin. And thus almoust all the voltage across your body acts across your skin. And thus the most power dissipates on your thin skin, and thus it burns.
You can maybe relate to this in a circuit this way: If you take a 0.00001Ω wire and short the main soccet, then while there is flowing lots and lots of current, and thus the overall dissipated power is very large, the dissipated power on this wire is very very low, and thus it wont get hot. Instead if the breaker doesnt pop, the wires in your house will get very hot.
But now if you put a 100Ω resistor across it, there wont be a lot of amps flowing, and thus overall power is very low. But still this resistor will get very hot, cause approx 500W are dissipated across it. The maximum power you will get out of the socket however (if it had no breakers) is if you use something, with the same impedance, as all the wires from the power plant to your socket. (you can derive this by the derivative of the power consumed by a resistor in series with another resistor).
Don't even try. The video is bs. It might outline some core concepts, but in detail it's full of inaccuracies, basically all units are explained wrong, resistors are explained wrong. It's a nightmare for any EE.
Another reason lower AC voltages are fatal is because the peak voltage is considerably higher than the RMS voltage, which is the figure used to convey the average amount of work done by a voltage that is always changing.
What? This is literally bullshit. None of this is factual and none of what you said even makes sense. rms Being a function of the sine wave, a peak voltage is always going to be proportional to the rms. 120v ac has 170v peak voltage.
Higher frequency AC is less likely to be lethal than DC or lower frequency AC, because of the skin effect. This tends to make current to flow more along the surface of a conductor than in its interior (because in the interior, the changing magnetic field induces reverse voltage that causes electrons to repel one another). This is why a Tesla coil doesn’t kill; most of the current stays on the skin increasing the resistance and reducing current.
Inductors used to tune the frequency at which a high powered radio transmitter operates are often hollow pipes to save weight and cost, since the current only flows on the surface.
1 KHz is the danger spot . 1 KHz is more dangerous than 50Hz, the reason for that is at that our nervous system also has more affinity . What do you mean by high frequency?
@@brad8122 im pretty sure around 20kHz is when the effect is really noticeable.
@@brad8122 "What do you mean by high frequency?" Haha, I like that question! Because it strongly depends on who you ask. I once talked to a physicist who told me "the skin effect is a low frequency approximation". I guess it all depends on the frequencies you usually work with :D
I once had a "no let go" experience when I pulled apart 2 metal connectors. I danced about for a while, my colleagues thought I was joking around, but soon realised that it was serious when I fell and pulled one of the cables from it's location. I was only 19, but my heart was throbbing for a long time!
Correction:
Resistor does drop the source voltage, but the main thing it does is "resist" the current. And it's the high current that kills the LED, not the high voltage. One other thing, the resistor burns when it receive high power (watts). It won't burn if you connect it to high voltage source but little to no current, and vice versa.
Saved me some typing! Thanks!
Also, the fact that there is a voltage drop is because the LED has resistance (ignoring forward voltage drop for the sake of simplicity).
This was a basic mistake that really frustrated me.
😍 Thank you. I was looking for this comment.
I was gonna say basically the same thing I know he was talking about continuous current sources but static shocks can upwards of like 40 amps for a very short time with little to no harm to the body.
These are really informative and interesting. Your channel deserves more recognition
At 11:40, the narration says "For starters, DC is much more lethal at lower currents than DC." The closed caption has it correct and says AC.
Correction: ventricular *fibrillation*. Defibrillation is the process of restoring normal electrical activity within the heart once it's gone into v-fib (by giving a properly coordinated electric shock).
I learned more about eletricity in this video than in the 3 years of my High School
Idk abt that 1.
Or you’re one of those kids who disrupts the entire class…
@@PatrioticSeer The physics teacher was designated to teach about the importance of water, for three years.... A third world country teaching about the enviroment has it's price
That live leak reference was too real 😅. LL, Ogrish, rotten etc taught me some very valuable lessons such as, always br grounded, wear a seatbelt, don't piss off narcos, don't piss of jihadists, don't piss off neo-nazis and in general just don't piss of anyone.
not gonna lie, Internet videos made me give up my dream of driving a forklift in a steel mill.
You want your appliances to be grounded, not yourself. If you are grounded then there is a clear path for electricity to flow from a live wire through you.
Wearing a seatbelt is akin to basically hanging and breaking your neck. It has an even higher mortality rate, but no, big auto doesn’t want you to know that
@@wolfetteplays8894 still using controversial statements to get people to look at your channel? Or are you just generally this despicable?
this is my second time finding one of your comments. It's like you're my own niche lolcow.
As ElectroBOOM covered in one video, AC is also more dangerous because our bodies act as capacitors to some degree, and AC flows more easily through a capacitor than DC does. He demonstrated this by showing that he did not receive as painful of a shock from DC voltage as he did from AC.
Current does not 'flow through' a capacitor - a capacitor has an insulator inside it that blocks current. Your mistake is a common one. Capacitors block current, so they're used to block DC. AC is said to 'pass' current loosely because electrons are attracted to and then repulsed from the plate on the far side of the capacitor because of teh charge on the plate - so it 'seems' like AC current 'passes through.' No electrons actually pass through, so no current.
DC can't pass through a capacitor. If it does, the capacitor has failed.
@@JonFrumTheFirst I wouldn't call that a mistake.
Saying current flows through a capacitor is a commonly used simplification. Just like saying "the sun rises in the east". Everyone knows the sun isn't rising (it is obviously the earth's movement relative to the sun that causes the observed effect). But everyone ist still saying it does. Some goes for AC currents and capacitors imho.
Oh, and if you want to get really technical capacitors do pass DC current, since no insulator is perfect. So they have a parasitic parallel resistance (often called EPR, not to be confused with ESR, sometimes "hidden" behind a self discharge time constant in datasheets).
@@TheMightyZwom I take your point, but I'm also sure that many uneducated people really do believe that caps pass current - because they've been told so. Similar problem in biology - using figurative language to describe evolution that is literally incorrect. Fine for students who have learned properly, but confuses the general public. Species don't 'try' to evolve - it just happens.
@@JonFrumTheFirst Yeah, okay. That is a problem, I do agree. Maybe I reacted too harshly - especially since I'm usually the first to cringe at false statements in for example "edcational" TV shows. They always mess up electrical engineering which makes me wonder what else they get wrong (where I don't have the knowledge to realize the mistakes).
What a cliffhanger, now you make me curious about why they flip the switch 3 times for different durations of time..
From a quick looking-up, the first shock (2300 volts/9.5 amps) is for knocking you out. The second shock (1000v/8a) is the most damaging one and slow-cooks your organs. The third shock (2300v/9.5a again) is to deliver the kiIIing blow if the second doesn't do the job.
This is just the procedure for Florida, however. It varies by state. Some other places don't alter the voltage or timing at all, just flipping the switch, letting it cool down, flipping it back on, etc. at regular intervals and a constant charge.
@@LendriMujina eyo cool thanks!
It's to reduce the amount of burning of the skin beneath the electrodes. The initial high voltage jolt (~2000v) was designed to inflict damage on the brain to produce instant unconsciousness and the lower voltage (220v to 1000v) damages the rest of the body which is why the lower voltage phase is usually much longer than the high voltage phase. Although some states did cut off the power between jolts, most changed voltages automatically without disconnecting the power in what is called a 'cycle'. The person throwing the switch (or more often pushing a button) typically had no control over the system aside from turning it on, the system would do all the work and shut itself down when the cycle was complete. If the person was still alive, the 'executioner' would be told to push the button again.
This made me want to fix my cable management
Wow. This was a fantastic video! I think I may have learned more about the difference between AC and DC current here than I did through all of science class.
seeing the dramatic side of it is cool, but all the in-depth scientific analysis on its core level is just amazing! I love how much effort has been put into this, and how science is indifferently fascinating regardless of how gruesome what happens at its hands may be. so damn cool
Very interesting!
Now what would interest me: Would there be a difference when someone has already a damage in the nerve system like demyelinization?
Wow! That's a very good question.
Not much
I have axonal damage with some demyelination caused by overexposure to now banned nerve poison. Every so often I get "electric shocks" in my feet, enough for me to suddenly shout out. I explain to onlookers in the shopping centre that my foot caught in the shopping trolley. ☹
I love how Electroboom is added and got a shout out and how funny yet educational this is lol. I subbed because of that i love you
MY DUDE. My entire life people have tried to explain to me how electricity works, as in what voltage and current is and what AC and DC are, and ive just never been able to understand it at all regardless of how they tried to explain it to me. This random video that showed up in my recommended explained it flawlessly to me in under 15 min. And i also now know why AC is more dangerous. NICE
this video helped understand electricty and the dangers waaaaaay better than what I'm learning as a Mechatronics engineer, thank you very much!
11:07 It's called ventricular fibrillation (VF) and defibrillation is a procedure performed to stop VF
Little correction: its the Synapse/Motor end plate where the chemicals get released. The Axon is the whole extension of the nerve, where the signal travles through
I'm incredibly lucky to be alive. Back in the 90's I had to close the electric fence gate at work by opening the box and physically pushing the relay to close it. I was young and too dumb to say no to the boss. Anyway, one winter night, I was standing in slush up over my ankles and my work gloves were wet and I got a shock that went from my hand to my feet. It lasted only a second or two before I pulled my hand away. I guess what saved me was the fact that I wasn't actually gripping anything, I was just pushing the relay with my finger. So I didn't get that grip lock thing.
I love your channel mate.
I have watched every single video of yours.
Pls make more videos mate, be consistent and let's hit that 500 k mark.
At about 12:26, there needs to be a correction made.
At 60 Hz the current "turns on and off" (reverses direction) 120 a second - not 60 times.
This is because a Hertz is based on the regularity of a full wave. One full wave includes two 'zero-cross-points' between negative and positive, therefore, there are two "on-off" cycles per Hertz. 60 X 2 = 120.
Thanks dude. Each time I see these morbid videos, I feel really lucky. Also, lucky that we got an educator like you. I work in Biotech and you are really inspiring.
Wow, thanks!
If only it was accurate. Resistors resist voltage now lol next diodes kill current
This was legendary thank you - I love how thorough it is :)
I love how in depth you went👍
When I was a small kid, I stuck scissors into an electric outlet, and experienced an electric shock. I still remember the sensation. I wonder whether I could have died that day.
It's possible, but luckily the nature of outlets means that the contractions from a shock will pull you away from it. I once did something similar when I was very young, but it was a 277v lightswitch. I thought someone had punched me.
I also did the same thing. When I was around 12 years old I inserted a nail into an electrical outlet, there was a sharp, vibrating pain as if my finger got cut with a vibrating knife. Maybe my finger wasn't very sweaty so not a lot of current passed through me, the muscles on my body didn't lock up and I pulled my finger away immediately. I was lucky to survive without any injuries, learnt a valuable lesson that day.
At age 8 or 9, I took a small motor from an electric toy train, connected two wires on the electric conductor tabs, and then inserted the wires into the left and right slots of the socket.
I wanted to see how fast the motor would spin with so much more energy than a 12v battery.
The motor spun for about an instant; but it immediately shorted out with a spark and smoke, startling me. Words cannot describe the level of disappointment I experienced by not even getting a little visible spin from that tiny motor powered by 120 volts!
For reasons yet unknown to me, a weird feeling came over me, and I decided not to try that again with any other tiny motors that I might have extracted from old toys. There was a strange instinct to stop this!
the chance to die just by "touching" the outlet is like 0.5%... i got at least 50 times shocked and i am still alive :) stop thinking that if you touch any current you will die like 90%... most of the time its nothing more then a little shock that wont do anything (self experiance)
@@MultiDominic111 If completing a circuit with a live outlet is relatively safe, what would make it unsafe?
I can remember putting one thumb on a live pin and the other thumb on a neutral pin of a broken plug, and that gave me a shock and a half at the full UK mains voltage. Just about the worst thing you can do, but it didn't do me any significant harm other than to get my heart beating really fast. Whatever happened I survived it.
Very thorough yet simple. Thank you .
Dayum! One of the best explanations of shock I've ever had! And I'm a lifetime electrician!!
WOW! What a powerful/ educational/ thrilling/ scary/ factual breakdown of electricity/electrocution!😱👍👍👍👍👍👍👍
I heard that they botched the first ever electric chair execution. Apparently it was a gory mess, and the condemned man was reduced to a pulp. One guy commented that being chopped up by an axe would’ve been a more humane way to go.
Outstanding explanation! You managed to teach basic electrical theory, physiology and pathology at a perfect level to understand the process of electrocution. The only mistake I could detect was the use of the term "ventricular defibrillation". Defibrillation is the action of correcting fibrillation, hence the term "defibrillator" associated with life saving first aid machines. The correct term for the pathology is "ventricular fibrillation". I mention this only because there could be confusion regarding defibrillator machines; everything else about this video was excellent!
Very well explained and interesting! Will definitely watch over again to remember more facts. Thanks for making it possible!
0:03 that's Mehdi Sadaghdar!
ah yes another anatomy video my favorite
ah yes another execution vid my favorite
I fucking love you and you’re videos man. I don’t care how long I have to wait. You’re doing great
I was working near a large parking lot several years ago. A fellow nearby was working on the lights in the parking lot. At some point his coworker turned the power back on thinking the electrician had completed his task. The electrician, working from a bucket truck let out sounds of anguish that I will never forget. I ran over and hit the emergency lower button on his bucket truck which lowered the bucket about 6 feet. By this time all was silent and the coworker was standing beside me. He lowered the bucket to the ground and we walked over to check the condition of the electrician. Although burned and still in a great deal of pain he had survived. How did I know about the emergency lower button on the electricians bucket truck? I drove the identical type bucket truck for a different company and had been dispatched to the adjacent lot. I just happened to be in the right place at the right time.
I learned about electricty when I was three years old.
I was singing into a kettle lead which was plugged into the mains.
I stuck the kettle lead in my mouth and woke up in the hospital minus a top lip.
Is your favorite big dinosaur a Thyranothaurath Rekth? lol
Hope this won't get age restricted like the decapitation one.
The current in AC isn’t turning on and off 60 times a second (in the US), it’s turning on and off 120 times a second, it’s a sine wave with 2 peaks, a + and a -, and 2 at 0 volts.
Here's a *shocking* story of mine:
In the summer of 2021 I did volunteer work for a farm that has many farm animals including horses, mules, and donkeys. One day I was tasked with pressure washing various pieces of equipment. So needless to say my jeans were soaked. After pressure washing I helped out with moving some animals to the other side of the pasture (from outside the barn). I went back inside to close the gate, left hand holding the chain but I had to step closer to get a hold of the gate. My left shin touched the high voltage lines that are used to deter animals from trying to climb the fencing, and the electricity went from my shin and out my left hand to the chain. I felt no pain at all, but it felt like my chest caved in for a split second like I was punched really hard. It made a super loud bang, and I was on my knees for a moment.
It seems to me like most fencing uses DC, so I'm guessing this is DC as well which would make sense because it just felt like a punch with no feeling of vibration or humming noise, just a bang.
every part of my body feels weird
Taught me more than my science class
This video doubles as a pretty good intro to voltage, current and resistance.
They should use this in school lectures.
Just came across this channel, and I'm glad I did... real cool stuff!
0:59 Anatomy of hatcheting the head 26 times. That would be a good video. Do it!!! Just! Do! It!
I love toast but I am still waiting for a machine that can turn toast into bread.
There actually ist such a machine!
It was invented by this guy: czcams.com/video/hC8pLdfcR_s/video.html
A time machine to reverse the direction of change in entropy.
This is so detailed and illustrated, thank you ! 👍
I find this information to be electrifying. The more I learn, the more grounded I become. This stuff truly sparks my interest. I absorbed it as easily as flipping a switch. I’m positively charged about this content!
XD AWESOME PUNS
😆 🤣
Some day your video will be shown to kids in a classroom to explain electrocution.
Muscles also have voltage-gated ion channels, mostly calcium, and they're used for the contraction as well. Is there any mechanism I'm ignoring that makes it so they, on their own, can't explain the shock-induced contractions?
Is that where the 1% of calcium goes?
Probably into the top 10 best youtube videos i've ever watched
7:42 best explanation of muscle movement
I needed this for a physiology test
Great video, one quick nit-pick though. At around 11:00 you start talking about the effects on the heart, and say that it can cause "ventricular Defibrillation", and you're ALMOST right. It actually causes "Ventricular Fibrillation", which is why the "shock machine" they use is called a "DEfibrillator" because it ends fibrillation, or DEfibrillates the heart. I know, medical terminology can be kinda confusing sometimes. All in all, a very tiny error in a great video! Keep up the amazing work!
Thank you for traumatizing me with this very informative video
Any time!
@@darkscienceyt 🙂
I love your channel man!
Sir You are The best lecturer in my whole Life!!!...u made Medicine nd physics that much simple!! God bless u nd Waiting for more videos
As an added layer of insurance, after you're sure you cut power to a circuit and you have to make contact with the dead equipment, it's always a good habit to make that first contact tap with the back of your hand, this avoiding "no let go".
or just wear insulated gloves and use a multimeter or voltage check. palm or no palm, it can kill. why tickles the bears foot if you can avoid it
The never ending debate, do the electrons move or do the holes between them?
Wowvee what a concise and a clear lecture, hats off
I learned so much. Engineering, biology, history... I'm so happy I found your channel. :-D
Electrocution is *always* fatal.
If it isn't fatal, then it's not electrocution. It's just an electric shock.
No electrocution is death or serious injury because of electric shock.
"Rubber has 10 - 100 MOhm"? Not really, it depends on the geometry, namely diameter and thickness. 0.001 inch thick rubber wire, 100km long can have hundreds of Peta-Ohms, while a 100 square meter rubber foil of 0.01 inch thickness can go down to below 1 kilo-Ohm easily....
My father was born in 72, being the youngest of [then] 9 siblings he wanted to become a electrician but he was born colorblind (red/green) and wasn't allowed to be one as back then cables was color coded.
But damn he proved to be quiet effective in repairing electronics(buying defected Ps1's, Ps3's). When questioned he answered that it was either one damaged capacitor or a bad soldiering that had to be fixed or a bad CD reader.
I swear this guy is underrated
The resistor limit the current which causing voltage drop, if left floating then the voltage isn't affected
"It's not the volts that kill you, it's the amps" is very unconvincing.
From now on if I ever had kids, I'm buying those electrical socket blockers
Extremely well done, thank you.
I just learned SO MUCH right now, I will see this video several times xD
Static electricity that you accumulate walking on a carpet on a cold day has a high voltage so it shocks you when you touch a metal doorknob, but does not kill you because the current is low....
No
The current can actually be quite high, but it's incredibly short-lived so no real damage is done.
Actually the current is several amperes but a very short time. Remember Ohm's law I = U/R.
Great video!!!! The voltage gated ion channels should have been BETWEEN the myelin sheath though, not on it (myelin is an insulator resulting in saltatory conduction).
9:11 in that video, the guy in the hi-vis gets up and walks past the guy, completely ignoring him
What a detailed video! This is amazing
60 Hz AC is NOT turning on and off 60 times a second. As you show in the video it changes direction, so to speak, as a sinusoidal wave. So it is positive 60 times a second and negative 60 times a second. If you call the peaks "on" and the zero crossings "off" this results in the current turning on and off 120 times a second. This, btw., is the frequency of the humming you might hear close to electrical equipment.
R.I.P Liveleak.
11:10 defibrillation is the return to normal beating. Fibrillation is the uncoordinated electrical activity
4:15 Rubber does not have a resistance as its own property. It has a resistivity. A particular piece of rubber has a resistance depending on length and cross-section.
Soo early YT ain’t working 😭
Same
Just clean the cache it'll fix for you
It's a good day when he uploads
I get to hear the soothing voice
Just discovered your awesome channel and SUBBED and RANG the bell ... you do a superb job on these and a ton of excellence. Thanks for all your hard work and your glorious channel.
In this video I learned everything I needed for my Physics test half a year ago. It was much easier to understand than my physics teacher. Very gud!