Electrical Machines A 3 - Φ induction motor draws an current of 50 A from mains when starts by direct switching. If an auto transformer with 60 % tapping is used for starting the current drawn from the mains will be 18. 36. 80. 50. 18. 36. 80. 50. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutation in a DC machine may be explained as a process in which magnetic field is set up. by which electric current in a coil is reversed. how alternate flux affects the main field flux. by virtue of which emf is induced in the armature conductors. in which magnetic field is set up. by which electric current in a coil is reversed. how alternate flux affects the main field flux. by virtue of which emf is induced in the armature conductors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An unexcited single phase synchronous motor is repulsion motor. universal motor. reluctance motor. AC series motor. repulsion motor. universal motor. reluctance motor. AC series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 V, 50 Hz, 4 pole single phase induction motor is rotating in the clockwise ( forward ) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 Ω. Then the effective rotor resistance in the backward branch of the equivalent circuit will be 4 Ω. 8 Ω. 2 Ω. 10 Ω. 4 Ω. 8 Ω. 2 Ω. 10 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hysteresis loss is proportional to f1.5. f2. f. f3. f1.5. f2. f. f3. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is minimized by laminating the core of a transformer? Stray loss. Hysteresis loss. Copper loss. Eddy current loss. Stray loss. Hysteresis loss. Copper loss. Eddy current loss. ANSWER DOWNLOAD EXAMIANS APP
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