Electrical Machines To avoid formation of grooves in the commutator None of these the brushes of same polarity should track each other. brush position has no effect on the commutator grooving. the brushes of opposite polarity should track each other. None of these the brushes of same polarity should track each other. brush position has no effect on the commutator grooving. the brushes of opposite polarity should track each other. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a practical synchronous motor the pull out torque will occur when the torque angle is nearly equal to 75°. 0°. 30°. 45°. 75°. 0°. 30°. 45°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer the magnetic coupling between the primary and secondary winding can be increased by using soft material for winding. using the magnetic core of low reluctance. using transformer oil of better quality. increasing the number of turns. using soft material for winding. using the magnetic core of low reluctance. using transformer oil of better quality. increasing the number of turns. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In the 3-phase induction motor, the resultant flux is of a constant nature and is 1/2 times maximum value of flux due to any phase equal to φm, where φm is the maximum flux due to any phase 3/2 times maximum value of flux due to any phase 3 times maximum value of flux due to any phase 1/2 times maximum value of flux due to any phase equal to φm, where φm is the maximum flux due to any phase 3/2 times maximum value of flux due to any phase 3 times maximum value of flux due to any phase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following, voltage regulation may be zero or negative All of these leading power factor unity power factor lagging power factor All of these leading power factor unity power factor lagging power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC motor with armature resistance of 0.5 ohms is connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is 250 A. 340 A. 570 A. 460 A. 250 A. 340 A. 570 A. 460 A. ANSWER DOWNLOAD EXAMIANS APP
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