Electrical Machines The armature reaction mmf in a DC machines has a form of rectangular. triangular. trapezoidal. sinusoidal. rectangular. triangular. trapezoidal. sinusoidal. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine, the armature windings are placed on the rotor because of necessity for development of torque. generation of voltage. commutation. electromechanical energy conversion. development of torque. generation of voltage. commutation. electromechanical energy conversion. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the frequency of rotor current of 50 Hz induction motor operating at 4% slip? 2.5Hz 50Hz 2HZ 1 Hz 2.5Hz 50Hz 2HZ 1 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf of a DC machine has stepped distribution and rotates at the speed of armature. triangular space distribution and rotates at the speed of armature. trapezoidal space distribution and is stationary in space. triangular space distribution and is stationary in space. stepped distribution and rotates at the speed of armature. triangular space distribution and rotates at the speed of armature. trapezoidal space distribution and is stationary in space. triangular space distribution and is stationary in space. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Capacitor in split phase induction motor is used to improve the power factor. reduce the harmonics. start the motor. improve the starting torque. improve the power factor. reduce the harmonics. start the motor. improve the starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer core is made up of a silicon steel laminations which has maximum flux density 1 Tesla. If it was cold rolled grain oriented its flux density increases to 1.6 Tesla. What is the saving in core size or area due to cold rolled grain oriented process? 40% 38% 60% 68% 40% 38% 60% 68% ANSWER DOWNLOAD EXAMIANS APP
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