Final answer:
The question addresses how transformer primary winding taps can vary the output voltage, but it omits the specific percentage. Transformers work on electromagnetic induction, with the turns ratio dictating the voltage transformation.
Step-by-step explanation:
The question involves understanding how taps on the primary winding of a transformer can adjust the voltage. In typical transformer designs, these taps provide a means to change the number of turns in the primary winding, hence altering the transformer's voltage output in discrete steps. However, the question seems to have omitted the specific percentage by which these steps occur. Transformers work on the principle of electromagnetic induction, where the ratio of the number of turns in the primary and secondary windings determines the voltage transformation. For instance, to calculate the number of turns in a transformer's secondary winding, you would use the formula derived from the transformer equation: Vp/Vs = Np/Ns ('V' represents voltage and 'N' represents the number of turns, with 'p' for primary and 's' for secondary).
For example, in a step-up transformer, if the primary winding has 100 turns and is connected to a 110-V source, and the secondary winding needs to output 2000 V, you would solve for Ns using Ns = Np * (Vs/Vp), giving Ns = 100 * (2000/110), which calculates to approximately 1818 turns in the secondary winding.