What is the primary purpose of a center-tapped transformer?

The primary purpose of a center-tapped transformer is to provide two equal voltages that can be used in a full-wave rectifier configuration. In such a configuration, the center tap serves as a common reference point, allowing both halves of the alternating current (AC) waveform to be utilized. When a full-wave rectifier is connected to the secondary winding of a center-tapped transformer, each half of the AC waveform is rectified and combined, resulting in a more efficient conversion to direct current (DC) compared to half-wave rectification.

The design of a center-tapped transformer inherently provides two outputs, which are equal in voltage yet opposite in phase. This is crucial for full-wave rectification since it relies on both halves of the AC cycle to produce a smoother and more consistent DC output.

In contrast, options that suggest increasing frequency or stepping up voltage for transmission purposes do not directly relate to the primary function of a center-tapped transformer. While a transformer can step up voltage, the specific configuration of a center-tap is not intended for that purpose. Additionally, converting AC to DC is a secondary function that relies on rectification but is not the primary role of the transformer itself. The design and function of a center-tapped transformer distinctly support