Final answer:
The question relates to the calculation of the equivalent impedance of a transformer based on given electrical specifications. The specifics involve a 25-kVA, 480-120-V transformer with a 2.1 percent impedance.
Step-by-step explanation:
The question involves finding the equivalent impedance referred to the high side of a step-down transformer used in electrical engineering. The transformer’s specifications include a power rating of 25 kVA, primary and secondary voltages of 480 V and 120 V respectively, a frequency of 60 Hz, and an impedance of 2.1 percent. The equivalent impedance can be calculated using the transformer ratings and the impedance percentage. However, additional information, such as the rated currents on both sides, would be required to answer (a) completely.