Electrical Machines The back emf produced in a dc motor depends on none of these. P and Z. Z. P. none of these. P and Z. Z. P. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature core of the rotor bars of dc motors are laminated to reduce mechanical losses. to provide better flux linkage. to reduce hysteresis loss. to reduce eddy current loss. to reduce mechanical losses. to provide better flux linkage. to reduce hysteresis loss. to reduce eddy current loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc motor with armature resistance of 0.5 ohms connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is 250 A. 570 A. 460 A. 340 A. 250 A. 570 A. 460 A. 340 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of a permanent magnet dc motor is 0.8 Ohm. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A from the same source will be 59.2%. 57.1%. 88.8%. 48.0%. 59.2%. 57.1%. 88.8%. 48.0%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines No load test of 3-phase induction motor gives which of the following? variable loss both A and B constant loss None of these variable loss both A and B constant loss None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which slots are used in the rotor of an induction motor? Closed slots. Semi closed slots. Open slots. None of above. Closed slots. Semi closed slots. Open slots. None of above. ANSWER DOWNLOAD EXAMIANS APP
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