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.
Shock is often only the. beginning of a chain of events. Even if the electrical current is too. small to cause injury, your reaction to the shock may cause you to. fall, resulting in bruises, broken bones, or even death. The length of time of the shock greatly affects the amount of injury.