In the context of the discussion, size doesn't matter. because the internal resistance differences from 9V battery to 9V battery make for a insignificant difference in the amount of current passing through one's tongue. At a load of 30kohms (like i measured on my tongue), a 9V battery (even a "consumer" one) will not drop more than a few hundreths of a volt. Try it and see.
It's true, AC is much more dangerous than DC, I was oversimplifying.
>So no, there is zero chance of getting >electrocuted from licking a 9V battery.
Where did I say there was?
As far as being killed from a 9V battery, consider this:
In this case, it is DC, but consider that at the sudden application of the current, even DC creates high frequency transient that could disrupt one's heart, similar to the way AC does. That my theory of what happened in this rare instance.
This is a BS story. As an electrical engineer, this is something i have to explain to people over and over again...
Any fresh 9V battery will shock you the same!
For EE's, the first law is ohm's law. V=I*R. Notice, there is nothing in this equation that allows for the varying capacities of batteries, their chemistry, whether or not they are "industrial grade". There is nothing to account for what rate of discharge (current) a battery is _capable_ of. Let's set up the equation using the example of an 9V battery. I have just measured my tongue's resistance at 30 Kilo-ohms according to my multimeter.
9V = I * 30000 I =.3 milliamps
Go and google "milliamps electrocution". 30 milliamps is the common level that is published, above which there is some risk of electricution. At 150mA the chance of death is significant. (A note, any industrial or consumer 9V is _capable_ of supplying at least this "dangerous" 30 mA, but only to a resistive load of less than 300 ohms. Obviously, a 9V battery applied to the tongue is not anywhere close to dangerous, though is within the range of sensation.
Back to the point: Did it matter what kind of 9V battery was used? No!! Go get a house-sized 9V battery that is _capable_ of discharging at a rate of hundreds of amps (IF the battery is connected to a load of low enough resistance), and you would feel no difference on your tongue.
Another thing to consider is that if you drove a 9V battery into your chest (though i imagine that could take some superhuman effort) the resistance through your internals is said to be as low as 500 ohms (or even less):
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No, I am not an idiot.
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In the context of the discussion, size doesn't matter. because the internal resistance differences from 9V battery to 9V battery make for a insignificant difference in the amount of current passing through one's tongue. At a load of 30kohms (like i measured on my tongue), a 9V battery (even a "consumer" one) will not drop more than a few hundreths of a volt. Try it and see.
It's true, AC is much more dangerous than DC, I was oversimplifying.
>So no, there is zero chance of getting
>electrocuted from licking a 9V battery.
Where did I say there was?
As far as being killed from a 9V battery, consider this:
http://www.darwinawards.com/darwin/darwin1999-5
In this case, it is DC, but consider that at the sudden application of the current, even DC creates high frequency transient that could disrupt one's heart, similar to the way AC does. That my theory of what happened in this rare instance.
This is a BS story. As an electrical engineer, this is something i have to explain to people over and over again...
.3 milliamps
Any fresh 9V battery will shock you the same!
For EE's, the first law is ohm's law. V=I*R. Notice, there is nothing in this equation that allows for the varying capacities of batteries, their chemistry, whether or not they are "industrial grade". There is nothing to account for what rate of discharge (current) a battery is _capable_ of. Let's set up the equation using the example of an 9V battery. I have just measured my tongue's resistance at 30 Kilo-ohms according to my multimeter.
9V = I * 30000
I =
Go and google "milliamps electrocution". 30 milliamps is the common level that is published, above which there is some risk of electricution. At 150mA the chance of death is significant. (A note, any industrial or consumer 9V is _capable_ of supplying at least this "dangerous" 30 mA, but only to a resistive load of less than 300 ohms. Obviously, a 9V battery applied to the tongue is not anywhere close to dangerous, though is within the range of sensation.
Back to the point: Did it matter what kind of 9V battery was used? No!! Go get a house-sized 9V battery that is _capable_ of discharging at a rate of hundreds of amps (IF the battery is connected to a load of low enough resistance), and you would feel no difference on your tongue.
Another thing to consider is that if you drove a 9V battery into your chest (though i imagine that could take some superhuman effort) the resistance through your internals is said to be as low as 500 ohms (or even less):
9V = I * 500
I = 18 milliamps
There is some non-zero chance of electricution.