I'm trying to find out when exactly an electric shock becomes lethal. I've heard that you need a certain current to flow across your heart (the number i've heard is 9mA), which is obviously dependent on the voltage source and the resistance of your body and the path the electricity takes when travelling through your body. Where does the length of time you are shocked come into the equation? I know that the power dissipated by your body = I²rt, but surely that's only referring to how badly your body gets burnt by the shock and not what's going to make your heart stop?
On a similar note, how do electric fences and tazers ensure that the person is only shocked and not killed? Simple current limiting like one would use in a lab power supply...?
On a similar note, how do electric fences and tazers ensure that the person is only shocked and not killed? Simple current limiting like one would use in a lab power supply...?