Electrical Machines A 3 - Φ, 6 pole, 50 Hz IM is running at a full load speed of 980 rpm. If it delivers an air gap power of 98000 Watt, calculate the rotor ohmic loss? 1960 Watt. 1920 Watt. 980 Watt. 1800 Watt. 1960 Watt. 1920 Watt. 980 Watt. 1800 Watt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become one fourth. double. half. 4 times. one fourth. double. half. 4 times. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following represents the pitch factor? Cos (α/2) Cos α sin (α/2) Cos α² Cos (α/2) Cos α sin (α/2) Cos α² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements: To control the speed of a dc shunt motor above the base speed over a reasonably wide range, the motor must 1. have compensating winding 2. have interpole winding 3. be started using a 3-point starter 4. be started using a 4-point starter Of these statements 2 and 4 are correct 1, 2 and 4 are correct 1, 2 and 3 are correct 1 and 3 are correct 2 and 4 are correct 1, 2 and 4 are correct 1, 2 and 3 are correct 1 and 3 are correct ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hunting in a synchronous motor takes place motor is under loaded. when load varies. when power factor is unity. when supply voltage fluctuates. motor is under loaded. when load varies. when power factor is unity. when supply voltage fluctuates. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4-pole DC generator runs at 1500 rpm. The frequency of current in the armature winding is: Zero Hz. 25 Hz. 100 Hz. 50 Hz. Zero Hz. 25 Hz. 100 Hz. 50 Hz. ANSWER DOWNLOAD EXAMIANS APP
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