Electrical Machines If the field of a dc shunt motor gets opened while the motor is running, then the armature current will drop motor will attain dangerously high speed armature will oscillate about original speed as the mean speed motor will become slow. armature current will drop motor will attain dangerously high speed armature will oscillate about original speed as the mean speed motor will become slow. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in a DC machine makes an angle of 90° with the main pole axis. is in direct opposition to the main poles. makes an angle with the main pole axis which is load dependent. is in the same direction as the main poles. makes an angle of 90° with the main pole axis. is in direct opposition to the main poles. makes an angle with the main pole axis which is load dependent. is in the same direction as the main poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc machine, 1. physically, the brush axis is along the direct axis 2. physically, the brush axis is along the interpolar axis 3. schematically, the brush axis is along the direct axis 4. schematically, the brush axis is along the quadrature axis 5. armaturemmf is directed along the brush axis From these, the correct statements are 2, 3, 5 1, 4,5 2, 4, 5 1 , 3, 5 2, 3, 5 1, 4,5 2, 4, 5 1 , 3, 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous motor, the damper winding is generally used to provide starting torque only. reduce the eddy currents. prevent hunting and provide the starting torque. reduce noise level only. provide starting torque only. reduce the eddy currents. prevent hunting and provide the starting torque. reduce noise level only. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which transformer, the tertiary winding is used? Delta - star Delta - delta Star - star Star - delta Delta - star Delta - delta Star - star Star - delta ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A differentially compound motor under high-over-load conditions will behave like a / an series motor. cummulative compound motor. shunt motor. AC synchronous motor. series motor. cummulative compound motor. shunt motor. AC synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
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