A 400 V, 30 kVA, single-phase alternator has an effective armature resistance of 0.3 Ω. An excitation current of 20 A produces 266 A armature current on short-circuit and an EMF of 400 V on open-circuit. The synchronous impedance and synchronous reactance of the alternator are, respectively, ________.
1
1.46 Ω and 1.5 Ω
2
20 Ω and 0.3 Ω
3
0.3 Ω and 20 Ω
4
1.5 Ω and 1.46 Ω