The main and auxiliary winding impedance of a 50-Hz, capacitor-start single-phase induction motor is Zm = (3 + j3) Ω and Za = (7 + j3) Ω. Determine the value of the capacitor to be connected in series with the auxiliary winding to achieve a phase difference of 90° between the currents of the two windings at the start.

The main and auxiliary winding impedance of a 50-Hz, capacitor-start s

1.	The main and auxiliary winding impedance of a 50-Hz, capacitor-start single-phase induction motor is Zm = (3 + j3) Ω and Za = (7 + j3) Ω. Determine the value of the capacitor to be connected in series with the auxiliary winding to achieve a phase difference of 90° between the currents of the two windings at the start.
A.	225 μF
B.	22.5 μF
C.	318 μF
D.	31.8 μF
Answer» D. 31.8 μF