Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. The frequency of rotor current is 0 Hz 5 Hz 50 Hz 1 Hz 0 Hz 5 Hz 50 Hz 1 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field winding of a DC series motor is usually provided with thick wire as it carries large load current. to provide large flux. in order to reduce eddy current to provide large flux. to reduce the insulation of materials. as it carries large load current. to provide large flux. in order to reduce eddy current to provide large flux. to reduce the insulation of materials. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a single phase capacitor start induction motor which of the following is valid? Rotation can be changed by reversing main winding terminals. Rotation can be changed by interchanging supply terminals. None of these. Direction of rotation cannot be changed. Rotation can be changed by reversing main winding terminals. Rotation can be changed by interchanging supply terminals. None of these. Direction of rotation cannot be changed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor hunting can be reduced to minimum possible by using a flywheel. designing the motor for adequate synchronizing power. any of above methods. providing damper winding in the rotor pole faces. using a flywheel. designing the motor for adequate synchronizing power. any of above methods. providing damper winding in the rotor pole faces. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, armature reaction refers to what? Effect of armature flux on the load. Effect of armature flux on the main field flux. None of these Effect of field flux on the armature flux. Effect of armature flux on the load. Effect of armature flux on the main field flux. None of these Effect of field flux on the armature flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will shift forward by less than 90° shift forward by more than 90° shift forward by 90° coincide with the GNA shift forward by less than 90° shift forward by more than 90° shift forward by 90° coincide with the GNA ANSWER DOWNLOAD EXAMIANS APP
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