Question

which volt amp curve represents a cv output?

a.
voltage
maximum
minimum
amperage

b.
voltage
maximum
minimum
amperage

Explanation:

Define Constant Voltage (CV) Output

Using the Constant Voltage and Welding Power Sources knowledge points, a Constant Voltage (CV) power source maintains a relatively stable, flat voltage level across a wide range of amperage changes. On a Volt-Ampere (V-A) graph, this characteristic is represented by a curve with a very shallow, nearly horizontal slope.

Define Constant Current (CC) Output

Using the Constant Current and Welding Power Sources knowledge points, a Constant Current (CC) power source is designed to maintain a relatively stable current (amperage) even when the voltage fluctuates due to changes in arc length. On a V-A graph, this is represented by a steep, drooping curve where large changes in voltage result in only minor changes in amperage.

Analyze the Given Curves

Using the Welding Power Sources knowledge point:

• Graph A shows curves that are nearly flat and horizontal. As amperage increases from minimum to maximum, the voltage drops only slightly. This represents a Constant Voltage (CV) output.
• Graph B shows steep, drooping curves. As voltage changes significantly, the amperage remains within a relatively narrow range. This represents a Constant Current (CC) output.

Identify the Correct Option

The question asks which Volt-Amp Curve represents a CV (Constant Voltage) output. Based on our analysis, Graph A represents the CV output. Therefore, the correct option is A.

Answer:

• (A) Graph A (Correct answer)
• (B) Graph B