Question

increasing the arc length results in an increase in what?

deposition rate
travel speed
penetration
voltage

Explanation:

Analyze the electrical characteristics of a welding arc

Using the Arc Length Rule and Voltage Definition knowledge points

An electric arc behaves as a resistor in an electrical circuit. The length of the arc is directly proportional to the electrical resistance of the arc path:

$$ R \propto L $$

where \(R\) is resistance and \(L\) is arc length.

Apply Ohm's law to determine the resulting change

Using the Voltage Definition knowledge point

According to Ohm's law, voltage \(V\) is the product of current \(I\) and resistance \(R\):

$$ V = I \times R $$

As arc length increases, resistance increases, which directly results in an increase in arc voltage.

Answer:

• Deposition rate
• Travel speed
• Penetration
• Voltage (Correct answer)