A low DC voltage is produced by the thermocouple when the two junctions are at different temperatures. This voltage is referred to as the thermoelectric voltage. This thermoelectric voltage is produced by the temperature gradient along the thermocouple wires.
Re: What's causes the electric shock type pain in a tooth Hi DM69. I'm not a dentist but I'm pretty sure its the erosion of your tooth exposing the pulp, I had the exact same feeling in my tooth before I had it extracted a month ago, so I feel your pain.
Take the first steps with my free 7 minute anxiety test. Obviously jaw discomfort can be caused by any number of dental issues as well. That's why it's always important to speak with a dentist, especially if it's been a while since you've visited one. Jaw pain is also rarely the only anxiety symptom you experience.