Electrical Machines No load test on induction motor is conducted to find which of the following losses? Rotational loss Stator copper loss All of these Stator core loss Rotational loss Stator copper loss All of these Stator core loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor, damper windings are provided on pole faces. None of these stator frame. rotor shaft. pole faces. None of these stator frame. rotor shaft. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is 115 V 200 V 460 V 230 V 115 V 200 V 460 V 230 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of generated emf in the armature coil of a DC machine is 1. the same as that of the current in a generator 2. the same as that of the current in a motor 3. opposite to that of the current in a generator 4. opposite to that of the current in a motor From these, the correct answer is 1, 4 2, 4 1, 3 2, 3 1, 4 2, 4 1, 3 2, 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase transformer when supplied from 220 V, 50 Hz has eddy current loss of 50 W. If the transformer is connected voltage of 330 V, 75 Hz, the eddy current loss will be 112.5 W 50 W 168.75 W 75 W 112.5 W 50 W 168.75 W 75 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power flow of a dc motor, with respect to a DC generator is reversed. increased. none of these. modified. reversed. increased. none of these. modified. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS