Electrical Machines Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become one fourth. half. double. 4 times. one fourth. half. double. 4 times. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor has negative speed regulation? Series motor Shunt motor Cumulative compound motors Differential compound motor Series motor Shunt motor Cumulative compound motors Differential compound motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC shunt motor if load is reduced DC Shunt Motor The speed will increase abruptly. The speed will increase in proportion to reduction in load. The speed will remains almost constant. DC Shunt Motor The speed will increase abruptly. The speed will increase in proportion to reduction in load. The speed will remains almost constant. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator sparking between brushes and commutator surface may be due to too rapid reversal of current. over commutation. any of the above. under commutation. too rapid reversal of current. over commutation. any of the above. under commutation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An ideal synchronous motor has no starting torque because rotor is made up of salient poles. rotor winding is highly reactive. relative velocity between stator and rotor mmf’s is not zero. relative velocity between the stator and rotor mmf’s is zero. rotor is made up of salient poles. rotor winding is highly reactive. relative velocity between stator and rotor mmf’s is not zero. relative velocity between the stator and rotor mmf’s is zero. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following rotor requires damper winding? Salient pole rotor. Both type rotor. Cylindrical rotor. None of these Salient pole rotor. Both type rotor. Cylindrical rotor. None of these ANSWER DOWNLOAD EXAMIANS APP
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