Electrical Machines As compared to an induction motor, the air gap in a DC motor is less than 50%. between 50% and 90%. more. same. less than 50%. between 50% and 90%. more. same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5Ω and back back emf 200 V is 400 A. 44 A. 40 A. 440 A. 400 A. 44 A. 40 A. 440 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor Decrease. Increase. Remains same. None of these. Decrease. Increase. Remains same. None of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The interpoles in dc machines have a tapering shape in order to reduce the overall weight economise on the material required for interpoles and their windings increase the acceleration of commutation reduce the saturation in the interpole reduce the overall weight economise on the material required for interpoles and their windings increase the acceleration of commutation reduce the saturation in the interpole ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following induction motor has the highest starting torque? Slip ring induction motor. Squirrel cage induction motor. None of these Same in both induction motors. Slip ring induction motor. Squirrel cage induction motor. None of these Same in both induction motors. 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 2, 3, 5 2,3 1, 4 1, 4, 5 2, 3, 5 2,3 1, 4 1, 4, 5 ANSWER DOWNLOAD EXAMIANS APP
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