Final answer:
The current required for welding a part depends on the material, thickness, and welding technique.
Step-by-step explanation:
The current required to weld a part depends on several factors. One of the primary factors is the material being welded. Different materials have different melting points, which in turn affect the amount of current needed for welding. For example, welding steel requires higher currents compared to welding aluminum.
The thickness of the material also influences the current required. Thicker materials generally require higher currents to achieve a strong weld.
The welding technique being used is another important factor. Different techniques, such as arc welding or spot welding, have different current requirements. For instance, arc welding typically requires higher currents compared to spot welding.