Final answer:
The correct equation for calculating the pu impedance is Zpu = Zactual / Zbase. This equation represents the relationship between the actual impedance of a circuit (Zactual) and the base impedance of the circuit (Zbase). The pu (per unit) impedance is the ratio of the actual impedance to the base impedance, and it is commonly used in power system analysis to compare the magnitudes of different impedances.
Step-by-step explanation:
The correct equation for calculating the pu impedance is:
Zpu = Zactual / Zbase.
This equation represents the relationship between the actual impedance of a circuit (Zactual) and the base impedance of the circuit (Zbase). The pu (per unit) impedance is the ratio of the actual impedance to the base impedance, and it is commonly used in power system analysis to compare the magnitudes of different impedances.