Millwright Level 1 Practice Exam

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In a constant voltage scenario, what is kept constant while the other variable changes?

Amperage is maintained, voltage varies
Voltage is maintained, amperage varies
Both are maintained
Neither are maintained

The correct answer is: Voltage is maintained, amperage varies

In a constant voltage scenario, the voltage level remains fixed, which means that it does not change during the operation. As a result, the amperage is able to vary based on the load connected to the circuit. This relationship is fundamental to Ohm's Law, which states that the current (amperage) in a circuit is proportional to the voltage across it and inversely proportional to the resistance. When voltage is held constant, if the resistance changes (due to varying loads), the current must adjust accordingly to maintain the balance defined by Ohm's Law. This highlights the dynamic nature of amperage in response to a constant voltage setting.