Electrical Machines In dc machines, the armature windings are placed on the rotor because of the necessity for electromechanical energy conversion commutation development of torque generation of voltage electromechanical energy conversion commutation development of torque generation of voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC Motor is driving a constant load torque having armature resistance of 0.25 Ω and armature current of 60 A having connected to a voltage of 230 V. Now a resistance of 1 ohm is added into the armature circuit. The ratio of their speed will be 1.24. 0.25. 0.62. 0.72. 1.24. 0.25. 0.62. 0.72. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If terminal voltage of one 1000 rpm shunt motor is reduced to half the speed of the motor will be 250 rpm 2000 rpm 1000 rpm 500 rpm 250 rpm 2000 rpm 1000 rpm 500 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power developed by salient pole synchronous machine is/are both 1 and 2 power due to saliency or reluctance only excitation power only None of these both 1 and 2 power due to saliency or reluctance only excitation power only None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC Shunt Motor having shunt field resistance of 250 Ω and armature resistance of 0.5 Ω is connected to 250 V supply and load current of 21 A. What is the back emf generated ? 150 V. 210 V 230 V. 240 V. 150 V. 210 V 230 V. 240 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following induction motor has the highest starting torque? None of these Same in both induction motors. Slip ring induction motor. Squirrel cage induction motor. None of these Same in both induction motors. Slip ring induction motor. Squirrel cage induction motor. ANSWER DOWNLOAD EXAMIANS APP
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