In a DC arc welding operation, the voltage-arc length characteristic was obtained as $V_{a r c}=20+5 l$ where the arc length $l$ was varied between $5 \mathrm{~mm}$ and $7 \mathrm{~mm} .$ Here $V_{\text {arc }}$ denotes the arc voltage in Volts. The arc current was varied from $400 \mathrm{~A}$ to $500 \mathrm{~A}$. Assuming linear power source characteristic, the open circuit voltage and the short circuit current for the welding operation are
(A) $45 V, 450 A$
(B) $75 \mathrm{~V}, 750 \mathrm{~A}$
(C) $95 V, 950 A$
(D) $150 V, 1500 A$
In a DC arc welding operation, the voltage-arc length characteristic was obtained as $V_{a r c}=20+5 l$ where the arc length $l$ was varied between $5 \mathrm{~mm}$ and $7 \mathrm{~mm} .$ Here $V_{\text {arc }}$ denotes the arc voltage in Volts. The arc current was varied from $400 \mathrm{~A}$ to $500 \mathrm{~A}$. Assuming linear power source characteristic, the open circuit voltage and the short circuit current for the welding operation are
(A) $45 V, 450 A$
(B) $75 \mathrm{~V}, 750 \mathrm{~A}$
(C) $95 V, 950 A$
(D) $150 V, 1500 A$