Millwright Level 1 Practice Exam

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In a constant current scenario, which variable is maintained while the other varies?

Voltage is maintained, amperage varies
Amperage is maintained, voltage varies
Both voltage and amperage are maintained
None of the above

The correct answer is: Amperage is maintained, voltage varies

In a constant current scenario, the defining feature is that the current (amperage) remains steady regardless of changes in other conditions. When amperage is maintained, the voltage will fluctuate based on the resistance in the circuit. This relationship is described by Ohm's Law, which states that voltage equals current times resistance (V = I × R). In practical applications, maintaining a constant current means that adjustments will be made to the voltage to account for variations in resistance caused by factors like load changes in electrical devices. This allows for consistent performance of devices that require a specific current to operate effectively. Given this context, since amperage is the variable being held steady while voltage changes to adapt to varying conditions, the correct answer illustrates this fundamental behavior in electrical circuits.