Most stick welding SMAW is done with Direct Current DC. As this current passes thru the base metal it can set up a circular current on either side of the weld area creating a magnetic effect. The arc is affected by this and whips back and forth drawn by this magnetic field. Metal is blown out of the arc and splatters onto the sides of the weld and the arc is hard to control. This arc blow can be reduced by passing a separate magnetic field thru the metal nullifying the effect, or by welding in the opposite direction, or by using Alternating Current AC
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area of an arc =lenght of arc *radius/2
find the arc length of minor arc 95 c= 18.84
No, arc measure is an ambiguous expression since it could also refer to the angular measure of the arc.
An arc. The arc covering less than half the circumference is called a minor arc; the arc covering more than half is called a major arc.
The length of arc ACB is 57.2.