Electrical Machines If any two leads from slip rings are interchanged in a 3 - Φ induction motor, the motor will get damaged. run in a direction opposite to previous one. not run. continue running in the same direction as before. get damaged. run in a direction opposite to previous one. not run. continue running in the same direction as before. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a 3-phase, 4 pole, 50 Hz synchronous motor the frequency, pole number and the frequency are halved. The motor speed will be 375 rpm 75 rpm 1500 rpm 3000 rpm 375 rpm 75 rpm 1500 rpm 3000 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC motor with armature resistance of 0.5 ohms connected directly to a 220 Volt supply. If the armature is stationary then the current flowing through the armature is 440 A. 340 A. 250 A. 570 A. 440 A. 340 A. 250 A. 570 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft torque of a dc motor is less than the electromagnetic torque because of eddy current losses. mechanical losses. hysteresis losses. ohmic losses. eddy current losses. mechanical losses. hysteresis losses. ohmic losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The interpoles in dc machines have a tapering shape in order to increase the acceleration of commutation reduce the saturation in the interpole economise on the material required for interpoles and their windings reduce the overall weight increase the acceleration of commutation reduce the saturation in the interpole economise on the material required for interpoles and their windings reduce the overall weight ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If dimension of all the parts of a synchorous generator and the number of field and armature turns are double, then generated voltage will change by a factor of 2. 8. 4. 1. 2. 8. 4. 1. ANSWER DOWNLOAD EXAMIANS APP
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