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Registered Member #61373
Joined: Sat Dec 17 2016, 01:45PM
Location: San Antonio, TX
Posts: 87
Wow, I learned something new today! Now that I understand Ohm's Law, I have a question.
If the voltage drops so much, why would the spark keep jumping to your skin? Doesn't it take a couple thousand volts to make a spark jump?
One example would be shocking a piece of meat with an ignition coil setup. It will still make a 1cm arc to the meat with ma current flow, and the spark dims. Doesn't it take 10,000v to make a spark jump 1cm through air?
Is the voltage drop to 400v inside the meat (100 Ohms) only when the electricity is flowing inside the meat? The arcs can jump 5mm on each contact point.
Registered Member #60240
Joined: Mon May 16 2016, 07:01PM
Location:
Posts: 304
There is another law, Kirchhoff`s law:
The sum of all the voltages around a loop is equal to zero.
"If the voltage drops so much, why would the spark keep jumping to your skin? Doesn't it take a couple thousand volts to make a spark jump? "
In your special case with the high voltage: If there is no current, you get the full voltage at the future spark gap, because the resistance of a not operating spark gap is infinite, and all other resistances of this loop could be neglected, practically zero.
"Doesn't it take 10,000v to make a spark jump 1cm through air?" Yes, but if the spark gap is operating the according resistance is quite low, could be in the order of around 100 Ohm.
"Is the voltage drop to 400v inside the meat (100 Ohms) only when the electricity is flowing inside the meat? The arcs can jump 5mm on each contact point. "
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Will 7,000 Volts Feel Different than 70 Volts, if they Both Put Out the Same Current?
