MIT Physics Demo -- Exploding Wire
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- Опубликовано: 7 авг 2008
- A 100 uF oil-filled capacitor is charged to 3 KV. This takes approximately 15 minutes, creating a charge on the capacitor that could be lethal. The capacitor is then discharged through a 12" length of 30 gauge bare iron wire.
When the high voltage current flows though high resistance wire, the bonds between iron molecules are shattered, resulting in a loud bang, a shower of sparks, and a cascade of wispy filaments floating through the air.
Not all of the charge on the capacitor is disharged through the wire, so a shorting bar must be used to release the remaining charge.
See original video on MIT TechTV - techtv.mit.edu/videos/635
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Wow... I had no idea you could explode iron wire. The more you know.
P.S. I'm sure MacGyver would know this, though.
Try aluminum wire in a water bath. But realize you will need to stand clear as the explosive force will probably destroy the roon
Probably not. Remember that an inductor opposes fast changes in current. The only way to do it with an inductor (using the BEMF) would be with immense currents through a large air-core inductor. An iron-cored inductor would be too "slow".
it's really funny that he jumpscared a bit when he discharged the capacitor, because when he exploded the wire he was like "meh... sparks, don't you have something less boring?"
A flash suit is hardly required for a paltry 450 joules (ie; watt-seconds) of stored energy.
nice
howto collect those exploded wire is there any chamber design ...? or any other patents to collect those nano size wire......
@BatixProductionsTE yeah, this could be right.
But imagine Voltage as the altitude of a cliff, if u'll fall down, your potential energy will transform in kinetik energy. When u'll hit the ground kinetik energy will transform in a massive body pressure peak and work(physics) breaking your bones.
Now what to write in a warning signpost? "Warning: high potential energy danger fall hazard" or "Warning: high altitude fall hazard"?
Same if u think about a pressurized tank. It isnt pressure killing u.
Вот как взрывается провод при емкости 100 мкФ и напряжении 3 кВ. Заряд накапливался 15 минут. При разряде вся энергия так и не израсходовалась, нужно было взять толще провод. Провод был 0,051 мм² длиной 30,5 см
Coming from MIT I was expecting some background info like how many joules was that? Also maybe some information about the expanding materiel, would copper have been a bigger explosion? Why or why not? Cool to see, not much to learn.
Exelente ! , gracias ,desde argentina.
I have heard that the flash from a short circuit can damage your eyes, possibly even blind you. If it were true then I would think a MIT guy would not expose his eyes to such a bright flash.
@jfdelgad assuming fes use 100mA (i really dunno that), but they have a duty cicle (usually less then 15%), u get 100mA for a very short time (15% period), then a long pause (75% of period), so medium current is 15mA.
U're right, if u touch the charged capacitor with 2 fingers of 1 hand u will not die, u will just loose your fingers.
Isn't that dangerous enaught 4 u?
Anyway, im not a MD, neither an electrician, try to ask them, but remember the explodind wire and try to answer yourself.
what makes they guys appearance appear jagged-like when he moves?
It sure can. It's all about the wattage.
I didn't know interlacing this bad was possible.
@absoluum Actually it's energy killing u.
Energy is Power multiplied by time.
High voltage means high current.
If u're thinking a 100kv spark cant kill u u're right, but only because usually that spark is produced discharging a low capacity capacitor.
Using a high capacity capacitor 3kV can kill u, indeed.
would an inductor with high inductance do the same trick?
@zker666 really? 450j is 1A for 450 seconds
@BatixProductionsTE not true.
High current and low exposition time (a spark) cant kill u.
Low current (20mA) and high exposition is lethal.
Current x Time = Energy.
It's energy killing u.
so that capacitor was rated for 3000 Volts? ...that awesome.
There isn't enough power available from that cap to justify an arc-flash suit. This isn't like a high-fault-current AC feeder circuit!
I just watched this video because the title had the word "exploding" in it.
Very small power supply, very small available charging current.
The wave effect caused when he was moving was more interesting.
Which words don't you understand?
DANGER DANGER. HIGH VOLTAGE! when we touch, when we kiss....
nothing left but ember
You are efficiently educating people; the Federal Department of Education will soon shut this(MIT Applied Technology You Tube Videos) down. Forgive them, they know not what they do and Vote for Ron Paul
Ah, well, that last is a much better way to get an answer than "WTF R U talking about". I suggest you lose the text-message-speak before you get to college.
So, the answers to your question are mostly already above, but: an "arc flash suit" is protective clothing - typically made from a non-flammable fabric like Nomex or Kevlar, sometimes covered with a metal coating to help reflect intense heat. The outfit would also include gloves and face/head protection. Search YT for "arc flash".
Boom. :D
thats only 450 joules, so not that much
@nonsquid They cannot do simple.
They can only bend the laws of reality.
@timramich
Just cuz a person is going to MIT, doesn't make them smart. I mean look at G.W. Bush. He went to Harvard...lol.
If you have the money, you can get into ANY school. :)
You would think people going to MIT would know how to properly deinterlace their videos.
@jfdelgad 20mA in AC can kill you, indeed. But in this case this is DC, lethal current should be 200mA.
Anyway assuming 500 ohm as body human resistance (left hand-right hand) Ohm law is Voltage/Current=Resistance, so 3kV/500=6Amps (6000mA)
I think that's more than enaught to kill u, but I dont wanna try this on myself :)
KABOOM.. KABOOM.. i want to press the button.. please leave me to press the button .. the button.. KABOOM KABOOM... MIT RULES.. crazy M.F. hehehe
NICE..
Lethal Voltage Present????
Anyone that has any knowledge of electronics knows that voltage is not lethal, current on the other hand is.