Electrical Machines Cogging and crawling are phenomena associated with the former during starting and the latter at a fraction of its rated speed. the former at a fraction of its rate speed and the latter during starting. cage induction machines and they are essentially the same. any of the above. the former during starting and the latter at a fraction of its rated speed. the former at a fraction of its rate speed and the latter during starting. cage induction machines and they are essentially the same. any of the above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a star - delta starting of an IM line voltage is 57.7 % of stator voltage. resistance is inserted in the rotor. applied voltage per stator phase is 57.7 % of a line volt reduced voltage is applied to the stator. line voltage is 57.7 % of stator voltage. resistance is inserted in the rotor. applied voltage per stator phase is 57.7 % of a line volt reduced voltage is applied to the stator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC motors, under trailing pole tips, flux density will_______ ? None of these either increase or decrease decrease increase None of these either increase or decrease decrease increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the armature electric current is increased to double its previous value, and the time of commutation is halved, how will the reactance voltage vary? It will be halved. It will becomes four times. It will remain the same. It will be doubled. It will be halved. It will becomes four times. It will remain the same. It will be doubled. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The efficiency of a transformer is mainly dependent on copper losses. dielectric losses. core losses. stray losses. copper losses. dielectric losses. core losses. stray losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Demagnetization effects which of the following? reduces the terminal voltage both B and C commutation reduction in main field flux reduces the terminal voltage both B and C commutation reduction in main field flux ANSWER DOWNLOAD EXAMIANS APP
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