There are various conditions that can cause muscle twitching. Minor muscle twitching is usually the result of less serious, lifestyle-related causes. More severe muscle twitching, however, is often the result of a serious condition.
An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte, a vacuum or air).
Electrode: A part of the electical circuit (Normally positive terminal is connected to it) Filler metal: Metallic wire used to fill the gap between the base metals to be joined. It need not be a part of the electrical circuit. Welding Rod: A colloquial name of electodes/filler metal used in SMAW process. An electrode could be either consumable or non-consumable. (i.e) during welding, the metal reqd to fill the gap could be provided by the electrode itself (SMAW, GMAW,SAW processes). In GTAW process, the tungsten electode is non-consumable & thats why it is called as autogenous welding.