What is the typical output of a welding machine?

The typical output of a welding machine being low voltage and high amperage is correct because welding processes, particularly those used in arc welding, require sufficient current to ensure a stable arc and effective heat generation at the weld point. Low voltage helps to prevent arcs from becoming too long or unstable, while high amperage provides enough heat to melt the base materials and filler material being used.

In welding, the heat produced is primarily a function of the current flowing through the circuit, making high amperage essential for processes like shielded metal arc welding (SMAW) or gas metal arc welding (GMAW). These methods typically operate at lower voltages compared to many other electrical applications, thus ensuring a concentrated heat source for effective fusion of metals.

Understanding the balance of voltage and amperage is crucial for weld quality, penetration, and control. This is why the correct answer emphasizes low voltage along with high amperage, as these parameters are optimized for welding efficiency and effectiveness.