A three-phase synchronous motor has a terminal voltage of 460 V and a terminal current of 120 A at a power factor of 0.95 lagging, synchronous reactance of 1.68 ohm and the field current is 47 A. The field to armature mutual inductance of the synchronous motor is _____________.
(a). 20mH
(b). 16mH
(c). 24mH
(d). 22mH
(a). 20mH
(b). 16mH
(c). 24mH
(d). 22mH