|MadSci Network: Physics|
Two factors matter when shocking the human body.....voltage and current The flow of current is what causes you to feel a shock. The human nervous system runs on electrical impulses. The more current that is forced through your body, the more effects you will suffer. Small amounts of current will cause you to feel funny, cause small muscle tremors and may stop the heart if the current flows near the heart. Large amounts of current will cause spasms, burn the body and do bad things to your organs. Skin is very resistive to electricity. That resistance drops when you are wet, sweaty or insert a needle past the skin into your body. Don't try this as it is very dangerous. People in the hospital with needles and wires in their bodies are at a greater risk of electrocution. Hospitals are very careful about this. Since skin resists the flow of current, you are safe from most voltages below 48 volts. Voltage is the pressure component of electricity. Higher voltage will force more current to flow through your skin just as higher water pressure causes more water to flow through a narrow pipe. Often as current starts to flow, the pressure (voltage) pushing it will drop since the source of the electricity may not have much energy at it's source. you see a similar thing when you turn on a faucet while someone is taking a shower. The water pressure drops due to the increaaed water flow and the person is the shower generally gets mad. Lightning is a combination of high voltage and high current. Lightning strikes have a lot of energy associated with them. Your magic device has high voltage and little current capability. Not much energy can come out of a small battery. The way your device works is that it stores energy in the coil of wire. When you push the button, the circuit converts this stored energy into a brief pulse of high voltage electricity. If you want to kow more details about the conversion, let me know and I will find some references. Gus
Try the links in the MadSci Library for more information on Physics.