Question

When welding with a direct current machine straight polarity, the electrode holder would be: ________

a. Positive
b. Negative
c. The current from both directions
d. The current flows from the electrode holder all the time

Answer 1

In straight polarity welding with a DC machine, the electrode holder is negative since the electron flow moves from negative to positive, with the electrode being the negative part.

Step-by-step explanation:

When welding with a direct current machine with straight polarity, the electrode holder would be negative. This is because, in straight polarity or DCEN (Direct Current Electrode Negative), the electrons flow from the negative terminal of the battery, which is connected to the electrode, towards the positive terminal that the workpiece is connected to. Since the electron flow (which is the actual movement of charge carriers) goes from negative to positive, and conventional current is defined in the opposite direction to the electron flow, the electrode holder in the setup described would indeed be negatively charged.