Question: Find the arc efficiency for GTAW process if the welding current is 1 5 0 Amp and the arc voltage is 2 0 V .

Find the arc efficiency for GTAW process if the welding current is 150 Amp and the arc voltage is 20 V. Assume a cathode drop of 8 V and anode drop of 3 V with 30% of the arc column energy being transferred to the anode. Take arc temperature as 15000 K. Work function do for tungsten is 4.5 eV and Boltzmann's constant =8.6210-5 eV/K.

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