GATE Mechanical Engineering (ME) 2016 Shift 2 Solved Paper

The voltage – Length characteristics of a direct current arc in an arc welding process is V = (100 + 40 L), where l is the length of the arc (in mm) & and V is arc voltage in volts. During a  welding operation, the arc length varies from 1 and 2 mm and the welding current is in the range 200 - 250 A. Assuming linear power source, the short circuit current is__________ A.