Question

question 9
increasing the arc length also increases what?
○ penetration
○ arc voltage
○ arc current
○ travel speed

Explanation:

In arc welding (a topic in Engineering, a subfield of Natural Science), as arc length increases, the resistance in the arc path increases. According to electrical principles (Ohm's law - \( V = IR \), assuming current \( I \) is relatively constant or the power source adjusts), an increase in resistance leads to an increase in arc voltage. Penetration is related to current and other factors, arc current is not directly increased by arc length (and may even decrease or be controlled), and travel speed is independent of arc length in this context.

Answer:

B. arc voltage (assuming the options are labeled as A. penetration, B. arc voltage, C. arc current, D. travel speed)