Which item is listed under Open Circuit Voltage Measurement?

Which item is listed under Open Circuit Voltage Measurement?

• A. Produces AC voltage
• B. Low voltage at low RPM
• C. Converts AC to DC
• D. Load through brushes

Answer: (C)

Open-circuit voltage measurement focuses on the voltage you get with no load connected. In many electrical machines, the generated voltage isn’t read directly as raw AC; it is first converted to DC by a rectifier bridge to supply the battery or field circuit. So, the open-circuit reading you’re evaluating is the DC voltage produced after this AC-to-DC conversion. That’s why “converts AC to DC” is the best fit. The other options describe generation, speed-related behavior, or the current path under load, which don’t specifically capture the no-load DC output you’re measuring.

Open-circuit voltage measurement focuses on the voltage you get with no load connected. In many electrical machines, the generated voltage isn’t read directly as raw AC; it is first converted to DC by a rectifier bridge to supply the battery or field circuit. So, the open-circuit reading you’re evaluating is the DC voltage produced after this AC-to-DC conversion. That’s why “converts AC to DC” is the best fit. The other options describe generation, speed-related behavior, or the current path under load, which don’t specifically capture the no-load DC output you’re measuring.