Electrical Machines In a transformer which of the following losses are zero? Iron loss Copper loss All of these Rotational loss Iron loss Copper loss All of these Rotational loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The squirrel cage induction motors are provided with blades in order to eliminate noise. facilitate cooling of rotor. balance the rotor dynamically. none of these. eliminate noise. facilitate cooling of rotor. balance the rotor dynamically. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC shunt generator working on load, the brushes are moved forward in the direction of rotation, as a result of this, commutation will worsen and terminal voltage will rise. improve but terminal voltage will fall. improve and terminal voltage will rise . worsen and terminal voltage will fall worsen and terminal voltage will rise. improve but terminal voltage will fall. improve and terminal voltage will rise . worsen and terminal voltage will fall ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of generated emf in the armature coil of a DC machine is 1. the same as that of the current in a generator 2. the same as that of the current in a motor 3. opposite to that of the current in a generator 4. opposite to that of the current in a motor From these, the correct answer is 2, 4 1, 3 1, 4 2, 3 2, 4 1, 3 1, 4 2, 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole DC generator runs at 750 rpm and generate an emf of 240 V. The armature is wave wound and has 792 conductors. If the total flux from each pole is 0.0145 Wb. What is the leakage co-efficient? 1.8. 1.2. 1.5. 1.4. 1.8. 1.2. 1.5. 1.4. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A lap wound DC machine has 400 conductors and 8 poles. The voltage induced per conductor is 2 volts. The machine generates a voltage of 100 V. 200 V. 400 V. 800 V. 100 V. 200 V. 400 V. 800 V. ANSWER DOWNLOAD EXAMIANS APP
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