In a constant current (CC) arc welding circuit, what happens to the current when the arc length changes?

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Multiple choice — select the best answer

AThe current increases as arc length increases
BThe current changes directly proportional to the arc length
CBoth current and voltage remain constant
DThe current remains relatively stable while the voltage changes

✓ Correct answer: D. The current remains relatively stable while the voltage changes Constant current power sources maintain a relatively stable amperage despite changes in arc length, which causes voltage to change instead. This makes them ideal for processes where maintaining consistent amperage is critical, such as SMAW.

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