Electrical Machines The speed of a cumulatively compound DC motor can be controlled by varying Armature resistance control. Any of above. Shunt field resistance control. Armature voltage control. Armature resistance control. Any of above. Shunt field resistance control. Armature voltage control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of the dc motor is generally of the range 50 ohm. 0.5 ohm. 100 ohm. 0.1 ohm. 50 ohm. 0.5 ohm. 100 ohm. 0.1 ohm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A compound dc generator is delivering full load current at a terminal voltage of 230 V. Its series-field winding gets short circuited. If its terminal voltage 1. becomes more than 230 V, it is overcompounded generator 2. becomes more than 230 V, it is differentially compounded generator 3. becomes less than 230 V, it is overcompounded generator 4. becomes less than 230 V, it is differentially compounded generator 5. becomes less than 230 V, it is level compounded generator From these, the correct answer is 1, 4, 5 2, 3, 5 1, 4 2,3 1, 4, 5 2, 3, 5 1, 4 2,3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of stator rotating magnetic field (RMF) with respect to rotor is Nr Zero Ns S.Ns Nr Zero Ns S.Ns ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The reduced air gap results in an increase cost of operation. breaking torque. starting torque. power factor. cost of operation. breaking torque. starting torque. power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Star - delta method of starting of motor is not possible in case of single phase induction motor. high torque motor. high speed motor. low horse power motor. single phase induction motor. high torque motor. high speed motor. low horse power motor. ANSWER DOWNLOAD EXAMIANS APP
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