MIG welders are powered input by which type of source and output?

MIG welders are powered input by which type of source and output?

• A. DC power source, converted to AC output
• B. AC and DC power source, converted to DC output
• C. AC power source, converted to DC output
• D. AC and DC power source, converted to AC output

Answer: (B)

MIG welding uses a direct-current welding current, and the machine’s power input can come from either AC or DC sources. Inside the welder, a rectifier converts whatever input power is available into DC to feed the welding circuit. That DC output is what actually sustains a stable MIG arc and predictable droplet transfer, which is why the common, flexible setup is described as accepting both AC and DC input and delivering DC output. So the best choice reflects this flexibility: the welder can be powered by either AC or DC, but the welding current it provides is DC. The other options would be incorrect because the arc for MIG welding is not supplied as AC, and not all machines are limited to one type of input power.

MIG welding uses a direct-current welding current, and the machine’s power input can come from either AC or DC sources. Inside the welder, a rectifier converts whatever input power is available into DC to feed the welding circuit. That DC output is what actually sustains a stable MIG arc and predictable droplet transfer, which is why the common, flexible setup is described as accepting both AC and DC input and delivering DC output.

So the best choice reflects this flexibility: the welder can be powered by either AC or DC, but the welding current it provides is DC. The other options would be incorrect because the arc for MIG welding is not supplied as AC, and not all machines are limited to one type of input power.