The voltage length characteristic of direct current arc is given by (V = 20 + 40L) volts, where L is the length of the arc in cm. The power source characteristic is approximated by straight line with open circuit voltage = 80 V and a short circuit = 1000 amp the arc length for maximum power

The voltage length characteristic of direct current arc is given by (V

1.	The voltage length characteristic of direct current arc is given by (V = 20 + 40L) volts, where L is the length of the arc in cm. The power source characteristic is approximated by straight line with open circuit voltage = 80 V and a short circuit = 1000 amp the arc length for maximum power
A.	0.25 cm
B.	0.5 cm
C.	0.65 cm
D.	0.80 cm
Answer» C. 0.65 cm