Thats How Russians charge their Mobile phone from railway ! - General

[QUOTE=chipset;43498868]That doesn't really make any sense though, high voltage systems that an average person is likely to encounter are usually relatively low current and high current systems that a regular person is likely to encounter is usually relatively high current. Going by that I should be terrified of the microwave oven transformer I rewound to kick out over 1000 amps. Except since power is the product of voltage and current, if I were to assume it was also high voltage I would have to assume it was very high power, when in reality I would say (though I haven't tried) it's completely safe to lick the output of that transformer, because it only outputs 2.5 volts open circuit. The assumption should be that if a circuit is high voltage it's dangerous. This is why warning sings say "danger high voltage" and not "danger high current".[/QUOTE] It's the amps that kill you alright, because that's the actual charge that is running through your body. I don't get what you mean with that transformer that can kick out over a thousand amps, that's a max value most likely. Look, electrical energy usually works with a voltage source. A current source is very rare, usually used to simplify certain electrical components (transistors, etc). A voltage induces a current, following ohm's law. So, high voltages induce high currents, which kills the man. High voltage does not ALWAYS mean high current, there is no such thing as an ideal voltage source, those sources have max values of current they can produce. For example, static shock: really high voltage, but it doesn't have enough charge to move to be lethal. So yeah, high current will always kill you, high voltage, not always.

[QUOTE=Penguiin;43498242]incorrect! what do you think static electricity is? it can be 10kV+ but it has 0 amps so it hurts but doesn't do any actual damage[/QUOTE] Jesus Christ people. There is in fact current flow. How else would your charge neutralize? Electrons move from point A to B, that's textbook electric current.

[QUOTE=judgeofdeath;43499775]It's the amps that kill you alright, because that's the actual charge that is running through your body. I don't get what you mean with that transformer that can kick out over a thousand amps, that's a max value most likely. Look, electrical energy usually works with a voltage source. A current source is very rare, usually used to simplify certain electrical components (transistors, etc). A voltage induces a current, following ohm's law. So, high voltages induce high currents, which kills the man. High voltage does not ALWAYS mean high current, there is no such thing as an ideal voltage source, those sources have max values of current they can produce. For example, static shock: really high voltage, but it doesn't have enough charge to move to be lethal. So yeah, [b]high current will always kill you[/b], high voltage, not always.[/QUOTE] But that's where you're wrong. I'm not exaggerating about a 1kA transformer, it has a 230 turn primary winding and about three turns of very thick wire on the secondary. It outputs only a few volts so the output side is completely safe to handle, typical skin resistance is in the order of 100k to several megaohms which means at 2 volts only a few microamps will flow through you if you were to touch the outputs. However when I short it out over something like a steel bolt the resistance will be far less than one ohm meaning hundreds - probably over a thousand - amps will flow, usually melting said bolt. Electricity kills [b]if the voltage is sufficient (usually 100+ volts) to deliver a lethal current (around 20mA across the heart) through the resistance of the skin and tissue of the person touching it.[/b].

[QUOTE=chipset;43500644]But that's where you're wrong. I'm not exaggerating about a 1kA transformer, it has a 230 turn primary winding and about three turns of very thick wire on the secondary. It outputs only a few volts so the output side is completely safe to handle, typical skin resistance is in the order of 100k to several megaohms which means at 2 volts only a few microamps will flow through you if you were to touch the outputs. However when I short it out over something like a steel bolt the resistance will be far less than one ohm meaning hundreds - probably over a thousand - amps will flow, usually melting said bolt. Electricity kills [b]if the voltage is sufficient (usually 100+ volts) to deliver a lethal current (around 20mA across the heart) through the resistance of the skin and tissue of the person touching it.[/b].[/QUOTE] That's pretty much what I said though. You are confusing high current with high max current. IF there is a high current it kills. My point was that if you see devices that have a certain ampage, it doesn't mean it will make that amount of current fly off into you if you touch it. That ampage usually denotes a maximal value, or the value that nominally flows through its components.

[QUOTE=judgeofdeath;43500976]That's pretty much what I said though. You are confusing high current with high max current. IF there is a high current it kills. My point was that if you see devices that have a certain ampage, it doesn't mean it will make that amount of current fly off into you if you touch it. That ampage usually denotes a maximal value, or the value that nominally flows through its components.[/QUOTE] I'm not confusing anything, but your statement that any high current system is lethal is completely false as I tried to explain using the example of my transformer which outputs an extremely high amount of current at almost zero volts. I'm not sure what you're getting at here but it sounds like you don't really know what you're talking about.

[QUOTE=chipset;43501288]I'm not confusing anything, but your statement that any high current system is lethal is completely false as I tried to explain using the example of my transformer which outputs an extremely high amount of current at almost zero volts. I'm not sure what you're getting at here but it sounds like you don't really know what you're talking about.[/QUOTE] Dude, you said it yourself, you get a high current when you short the system. That means it has a high [B]maximum[/B] current it can provide, the transformer will still (from that side) act like a voltage source. You short it, meaning very low resistance, and high current comes out, even at low voltage. This doesn't mean it will always output that amount of current. Going back to my first post, I said high current will always kill you. By this I meant when it passes through you. In fact, in all my posts, whenever I talked about a current being lethal, I meant when it passes through you of course. [editline]eh[/editline] [QUOTE=chipset;43500644] Electricity kills [B]if the voltage is sufficient (usually 100+ volts) to deliver a lethal current (around 20mA across the heart) through the resistance of the skin and tissue of the person touching it.[/B].[/QUOTE] Maybe I should clarify, but I'm not even arguing against this. I completely agree with this statement. But if there's a high current flowing through you, a high voltage is already implied, so high current through body = dead.

Seems like just a bunch of mutual misunderstanding, let's drop it.

[QUOTE=Penguiin;43498242]incorrect! what do you think static electricity is? it can be 10kV+ but it has 0 amps so it hurts but doesn't do any actual damage[/QUOTE] Do you know of a fellow named Georg? He had this little rule. A law, some even call it. [img]http://upload.wikimedia.org/math/7/f/0/7f071f258dbaa6f9a41fbcb70572c316.png[/img] "I" stands for current if you don't know. Now, how much voltage would you need in order for the equation to equal 0? I.e. I to equal 0? I'll let you ponder on that one.

[QUOTE=Stopper;43509863]Do you know of a fellow named Georg? He had this little rule. A law, some even call it. [img]http://upload.wikimedia.org/math/7/f/0/7f071f258dbaa6f9a41fbcb70572c316.png[/img] "I" stands for current if you don't know. Now, how much voltage would you need in order for the equation to equal 0? I.e. I to equal 0? I'll let you ponder on that one.[/QUOTE] When people say 0 amps, they mean a very small amperage.

[QUOTE=Coffee;43580846]When people say 0 amps, they mean a very small amperage.[/QUOTE] silly americans

[QUOTE=Cushie;43484673]stuff[/QUOTE] it's called ALSN btw [url]http://en.wikipedia.org/wiki/ALSN[/url]

Facepunchers should never discuss physics

Voltage and Amps are two different ways of looking at something. 1x10^-9 Volts @ 0.080mA is enough to kill a person if that is the magnitude of each [I]measured at the heart[/I]. Does anyone read Cyrillic and know if that is an inductor or a capacitor that they are using? (Blue object)