Sciatica pain isn't a disorder, but rather a symptom of a larger problem, usually a bulging or herniated vertebral disk. This is the most common cause of sciatica nerve pain, but other spinal issues such as a tumor (yikes!) or injury (major hip surgery) could also be the cause. A condition called *Piriformis syndrome, can also cause sciatica. This is when the piriformis muscle tightens spasms, putting pressure on the nerve creating pain.
Confidence votes 7.8K. Reverse polarity is the opposite of normal polarity. Normal polarity in electronics is when you have the positive hooked up to the positive terminal and the negative to the negative terminal.Reverse polarity would be having the positive hooked up to the negative terminal and the negative to the positive terminal. The same concept can be used with magnets.everse polarity would be having the positive hooked up to the negative terminal and the negative to the positive terminal. The same concept can be used with magnets.
This makes an erratic flow for SMAW, producing more spatter and a more unstable current. I used AC for welding 6011 for a couple of years. The welds were OK, but give me DC anytime. 3. Direct current electrode positive (DCEP) is what we used to call reverse polarity. Direct current electrode negative (DCEN) is what we used to call straight polarity. I suspect the same person who changed the word library to the learning resource center got a hold of these terms. In DCEP the electricity flows into the tip of the welding rod and concentrates about two-thirds of the heat, which gives good penetration.