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During a TIG welding process, the arc current and arc voltage were 50 A and 60 V, respectively, when the welding speed was 150 mm/min. In another process, the TIG welding is carried out at a welding speed of 120mm/min at the same arc welding voltage and heat input to the material so that weld qualify remains the same. The welding current (in A) for this process is    

(a) 40.00                (b) 44.72

(c) 55.90                 (d) 62.25

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