Electrical Machines The crawling in the induction motor is caused by harmonics developed in the motor low voltage supply improper design of stator laminations high loads harmonics developed in the motor low voltage supply improper design of stator laminations high loads ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC 4 pole lap wound generator is running at 1000 rpm having 1200 conductors and flux density is 10 mwb. find the generated emf? 100V 20V 200V 10V 100V 20V 200V 10V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a given torque, reducing divertor resistance of a DC series motor Decrease in speed demanding less armature current. Increase in speed demanding more armature current. Increase in speed but armature currnet remains the same. Decrease in speed but armature current remains the same. Decrease in speed demanding less armature current. Increase in speed demanding more armature current. Increase in speed but armature currnet remains the same. Decrease in speed but armature current remains the same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer which of the following losses are zero? Copper loss All of these Rotational loss Iron loss Copper loss All of these Rotational loss Iron loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous motor, the damper winding is generally used to provide starting torque only. reduce noise level only. prevent hunting and provide the starting torque. reduce the eddy currents. provide starting torque only. reduce noise level only. prevent hunting and provide the starting torque. reduce the eddy currents. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions hunting of synchronous motor is likely to occur ? Periodic variation of load. Over-loading for long period. Over-excitation. Small and constant load. Periodic variation of load. Over-loading for long period. Over-excitation. Small and constant load. ANSWER DOWNLOAD EXAMIANS APP
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