In a DC arc welding operation, the voltage-arclength characteristic was obtained as Varc = 20 +…

In a DC arc welding operation, the voltage-arclength characteristic was obtained as Varc = 20 + 5Lwhere the arc length L was varied between 5 mmand 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 characteristic, theopen circuit voltage and the short circuit current forthewelding operation are(a) 45 V, 450 A (b) 75 V, 750 A(c) 95 V, 950 A (d) 150 V, 1500 A