Electrical Machines Speed of DC motor can be controlled by varying its flux oer pole. resistance of armature culture. all of these. applied voltage. its flux oer pole. resistance of armature culture. all of these. applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increases in field excitation of a DC generator, its generated emf increases upto a limit and then remains almost constant. increases. remains constant. decreases. increases upto a limit and then remains almost constant. increases. remains constant. decreases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Semi closed slots or totally closed slots are used in induction motors, essentially to increase pull out torque reduce magnetising current and improve power factor improve starting torque decrease starting torque increase pull out torque reduce magnetising current and improve power factor improve starting torque decrease starting torque ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The flux is maximum in the following part of a DC motor: under the interpole. under leading pole tip. pole core. under trailing pole tip. under the interpole. under leading pole tip. pole core. under trailing pole tip. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the handle of a three point starter goes to back to OFF position, it may be due to zero or very low voltage supply. over load. all of these. high filed circuit resistance. zero or very low voltage supply. over load. all of these. high filed circuit resistance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cogging of induction motor occurs at low voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are not equal. low voltage and when stator and rotor poles are not equal. low voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are not equal. low voltage and when stator and rotor poles are not equal. ANSWER DOWNLOAD EXAMIANS APP
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