Electrical Machines In dc motors, under leading pole tips flux density will--------? increase decrease either increase or decrease None of these increase decrease either increase or decrease None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is the largest conversion device? All of these Induction machine Synchronous machine DC machine All of these Induction machine Synchronous machine DC machine ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motors has low ratings only? Resistance split phase Capacitor start Capacitor run Shaded pole Resistance split phase Capacitor start Capacitor run Shaded pole ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The efficiency of a transformer is mainly dependent on core losses. copper losses. stray losses. dielectric losses. core losses. copper losses. stray losses. dielectric losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If peak value of phase mmf is F max , then peak value of the rotating field caused by three phase is 3Fmax. Fmax. (1/2)Fmax. (3/2)Fmax. 3Fmax. Fmax. (1/2)Fmax. (3/2)Fmax. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf in a dc machine is 1. stationary with respect to field poles 2. stationary with respect to armature 3. rotating with respect to field poles 4. rotating with respect to armature From these, the correct answer is 2, 4 2, 3 1, 4 1, 3 2, 4 2, 3 1, 4 1, 3 ANSWER DOWNLOAD EXAMIANS APP
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