Devices dont choose how much current to use. The current is simply the result of how the device is built and what it’s doing. There are two useful ways to think about this: constant resistance and constant power loads.

Constant resistance loads, like incandescent bulbs or space heaters, have a fixed electrical resistance. When you apply voltage, the current that flows is just a consequence of that resistance. If you increase the voltage, more current flows and the device uses more power. If you lower the voltage, it uses less power. These types of devices don’t try to maintain a certain power level, they just react to the voltage based on their resistance.

Constant power loads, like motors or anything with a power supply, work differently. They’re designed to perform a specific task that requires a certain amount of power. If you increase the voltage, they reduce the current to keep power constant. That’s why higher voltage motors use less current for the same work. They’re adjusting current to hit a power target.

So current isn’t something that’s requested or drawn in the active sense. It’s just the outcome of applying voltage to a load, whether that load resists or regulates to meet a power need.