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.
Â· just now. Report Abuse. If you have a silver filling in your tooth and it touches something metalic like a fork or a piece of foil, it hurts because of a phenomenon called galvanic shock. The energy is conducted through one metal to the other and you get a shock.