Electrical Machines The speed regulation of a DC motor is given as NnL − NfL. NnL/NfL. (NnL − NfL)/NfL. (NfL − NnL)/NnL. NnL − NfL. NnL/NfL. (NnL − NfL)/NfL. (NfL − NnL)/NnL. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Skewing of the rotor in a 3 - Φ squirrel cage induction motor reduces noise and parasitic torque, but increase starting and pull-out torque. noise, parasitic torque, starting torque and pull out torque. noise and pullout torque, but increase parasitic and starting torque. noise, parasitic and starting torque, but increase pull out torque. noise and parasitic torque, but increase starting and pull-out torque. noise, parasitic torque, starting torque and pull out torque. noise and pullout torque, but increase parasitic and starting torque. noise, parasitic and starting torque, but increase pull out torque. ANSWER DOWNLOAD EXAMIANS APP
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 Capacitor start capacitor run provides high power factor only. high staring torque only. high staring torque and high power factor. none. high power factor only. high staring torque only. high staring torque and high power factor. none. 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? 1.2. 1.5. 1.8. 1.4. 1.2. 1.5. 1.8. 1.4. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the frequency of rotor current of 50 Hz induction motor operating at 4% slip? 50Hz 1 Hz 2HZ 2.5Hz 50Hz 1 Hz 2HZ 2.5Hz ANSWER DOWNLOAD EXAMIANS APP
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