Electrical Machines When the excitation of normally operating unloaded, salient pole synchronous motor suddenly gets disconnected, it continues to run as a induction motor. switched reluctance motor. DC motor. variable reluctance motor. induction motor. switched reluctance motor. DC motor. variable reluctance motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine, which of these parameters remain the same whether it runs as a DC motor or a DC generator? Mechanical power. Armature current. Induced emf. Can not be determined. Mechanical power. Armature current. Induced emf. Can not be determined. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What happens if fifth multiples of harmonics is given to induction motor? It will rotates in normal operation. Either short circuit or open circuit occurs. Fail to start. It will rotates in reverse direction. It will rotates in normal operation. Either short circuit or open circuit occurs. Fail to start. It will rotates in reverse direction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of the dc motor is generally of the range 50 ohm. 100 ohm. 0.5 ohm. 0.1 ohm. 50 ohm. 100 ohm. 0.5 ohm. 0.1 ohm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Addition of 0.3 % to 4.5 % silicon to iron increases the electrical resistivity of iron. increases the hysteresis loss. None of these reduces the saturation magnetization. increases the electrical resistivity of iron. increases the hysteresis loss. None of these reduces the saturation magnetization. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator in dc machine provide ----------------- rectification? half wave controlled full wave full wave controlled half wave half wave controlled full wave full wave controlled half wave ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS