Write Short Notes on the following topics

Where applicable write about the definition of the term, significance, applications, examples, applicable equations, and draw sketches. Keep the notes brief and to the point. One paragraph $($about $8-10$ lines$)$ should be an adequate length for a short note.

$1.$ Gas Metal Arc Welding $($GMAW$)/$ Metal Inert Gas $($MIG$)$ Welding