Electrical Machines A transformer has maximum efficiency at 3/4 load. The ratio of iron loss and full load copper loss is 4/3. 3/4. 9/16. 16/9. 4/3. 3/4. 9/16. 16/9. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip rings of an induction motors are made of stainless steel. phosphor bronze. aluminium. carbon. stainless steel. phosphor bronze. aluminium. carbon. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole, 3-phase induction motor is running at 4% slip at full load. If the speed of the motor is 720 rpm, the supply frequency is 25 Hz 60 Hz 40 HZ 50 Hz 25 Hz 60 Hz 40 HZ 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC Shunt Motor electromagnetic torque developed is Proportional to the square of armature current. Proportional to the armature current. None of above. Inversely proportional to the armature current. Proportional to the square of armature current. Proportional to the armature current. None of above. Inversely proportional to the armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous generator a synchronous dead load (lamp, furnaces etc) has no ____________ hence it has no natural frequency of oscillation. mechanical rotatory system. damping torque. synchronizing power co efficient. restoring torque. mechanical rotatory system. damping torque. synchronizing power co efficient. restoring torque. 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 200 V. 400 V. 800 V. 100 V. 200 V. 400 V. 800 V. 100 V. ANSWER DOWNLOAD EXAMIANS APP
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