What distinguishes primary from secondary taps in a transformer?

The correct choice highlights a fundamental aspect of transformer operation. In a transformer, the primary winding is connected to the input voltage source, which is responsible for drawing power from the supply and generating a magnetic field. This interaction allows the transformer to transfer energy to the secondary winding, producing an output voltage.

The mention of primary taps connecting to the input voltage side clarifies that these taps are part of the primary winding and participate directly in the initial energy transfer process. Conversely, the secondary taps relate to the output voltage side of the transformer, where the energy is delivered and utilized in a secondary circuit. Thus, secondary taps provide the voltage that is available for use after the transformation process.

Understanding this distinction between the roles of primary and secondary taps is crucial for anyone working with transformers, as it helps in the design, setup, and troubleshooting of electrical systems that depend on voltage conversion and distribution.