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 40 HZ 25 Hz 60 Hz 50 Hz 40 HZ 25 Hz 60 Hz 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Neglecting all losses, the developed torque (T) of DC separately excited motor, operating under constant terminal voltage is reduced to its output power (P) as T ∝ √P. T2 ∝ P3. T ∝ P. T is independent of P. T ∝ √P. T2 ∝ P3. T ∝ P. T is independent of P. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Tertiary winding in a transformer is mostly delta connected. zig - zag star connected. star connected. zig - zag delta connected. delta connected. zig - zag star connected. star connected. zig - zag delta connected. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous generator is feeding a zero power factor (lagging) load at rated current. The armature reaction is ineffective. magnetizing. demagnetizing. cross – magnetizing. ineffective. magnetizing. demagnetizing. cross – magnetizing. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The function of field regulator in a DC compound motor is to limit the armature current. vary the armature resistance. control field current. none of above. limit the armature current. vary the armature resistance. control field current. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The full load copper loss and iron loss of transformer are 6400W and 5000W respectively. The copper loss and iron loss at half load will be respectively? 3200 W and 5200 W 1600 W and 1250 W 3200 W and 2500 W 1600 W and 5000 W 3200 W and 5200 W 1600 W and 1250 W 3200 W and 2500 W 1600 W and 5000 W ANSWER DOWNLOAD EXAMIANS APP
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