2) A certain plasma arc (welding arc) can be approximated as a cylinder of high- temperature conducting gas that extends from the welding rod tip to the work-piece. This conducting cylinder can be assumed to have a constant circular cross-section with a radius of R = 4.50 mm which carries a current along its length having a density given by:
2) A certain plasma arc (welding arc) can be approximated as a cylinder of high- temperature conducting gas that extends from the welding rod tip to the work-piece. This conducting cylinder can be assumed to have a constant circular cross-section with a radius of R = 4.50 mm which carries a current along its length having a density given by:
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Transcribed Image Text:2) A certain plasma arc (welding arc) can be approximated as a cylinder of high-
temperature conducting gas that extends from the welding rod tip to the work-piece. This
conducting cylinder can be assumed to have a constant circular cross-section with a radius
of R = 4.50 mm which carries a current along its length having a density given by:
J = J, ear
Jo = (7.50 x 10° A/m?)
r= the radial distance from the center of the cylinder
a = 334 m
where:
Find the total electric current flowing through this plasma arc.
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