Which voltage reduction method is achieved by connecting a transformer as an autotransformer?

Using a transformer as an autotransformer is specifically associated with the method of voltage reduction, commonly referred to as voltage bucking. In an autotransformer, a single winding serves as both the primary and the secondary, with part of the winding shared between the input and output circuits. This configuration allows for a portion of the input voltage to be tapped off at a lower voltage level.

When configured in this way, the autotransformer leverages the principle of electromagnetic induction to step down the voltage. The portion of the winding that is connected to the load effectively reduces the voltage delivered to the load compared to what is being supplied to the primary side. This capability to decrease voltage while still maintaining a connection to the higher voltage source clearly embodies the concept of voltage bucking, which is essential in applications where reduced voltages are needed for specific equipment or conditions.

Other methods such as voltage multiplication, voltage isolation, or voltage boosting operate under different principles and configurations. Voltage multiplication involves using a combination of capacitors and diodes to increase voltage, while voltage isolation typically requires transformers with separate primary and secondary windings to provide electrical separation. Voltage boosting, on the other hand, refers to increasing voltage levels, which is the opposite of the reduction achieved through buck