Electrical Machines The speed of rotating magnetic field of 8 pole 50 Hz induction motor is 750 rpm 3000 rpm 1000 rpm 1500 rpm 750 rpm 3000 rpm 1000 rpm 1500 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Poles of DC machine are often laminated to reduce armature reaction. reduce pulsation loss. dissipate more heat. reduce iron weight. reduce armature reaction. reduce pulsation loss. dissipate more heat. reduce iron weight. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Demagnetization effects which of the following? reduces the terminal voltage reduction in main field flux commutation both B and C reduces the terminal voltage reduction in main field flux commutation both B and C ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dynamic braking can be used for All of these compound motors. shunt motors. series motors. All of these compound motors. shunt motors. series motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If starter is not used with large DC motor for starting, it will damage the armature and commutator. provide execessive voltage drop in line. draw a starting current many times its rated full load current. all of above. damage the armature and commutator. provide execessive voltage drop in line. draw a starting current many times its rated full load current. all of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, the ripples in the direct emf generated are reduced by employing equalizer rings. carbon brushes. graphite brushes. commutator with large number of segments. equalizer rings. carbon brushes. graphite brushes. commutator with large number of segments. ANSWER DOWNLOAD EXAMIANS APP
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