A 3-phase, 500V, 100 h.p., ϕ connected cylindrical rotor synchronous machine has a per phase impedance of 0.3 + j3 ohms. The machine runs as a motor with the rated supply voltage and in an over-excited condition.

What is the per phase impedance of the machine?
A) 0.3 ohm
B) j3 ohm
C) 0.3 + j3 ohm
D) 3 + j3 ohm