Multiple choice

In a DC arc welding operation, the voltage arc length characteristics was obtained as Varc = 20 + 5l where the arc length l was varied between 5 mm and 7 mm. Here, Varc denotes the arc voltage in Volts. The arc current was varied from 400 A to 500 A. Assuming linear power source characteristics, the open circuit voltage and the short circuit current for the welding operation are

  1. 45 V, 450 A

  2. 75 V, 750 A

  3. 95 V, 950 A

  4. 150 V, 1500 A
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C Correct answer
Explanation

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