Electrical Machines A transformer has hysteresis loss of 30 W, at 240 V, 60 Hz. The hysteresis loss at 200 V, 50 Hz will be 28 W. 25 W. 36 W. 30 W. 28 W. 25 W. 36 W. 30 W. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC Shunt Motor having shunt field resistance of 250 Ω and armature resistance of 0.5 Ω is connected to 250 V supply and load current of 21 A. What is the back emf generated ? 240 V. 210 V 150 V. 230 V. 240 V. 210 V 150 V. 230 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the shunt resistance component equivalent circuit obtained by no load test of an induction motor representative of ? windage and friction loss core loss only both 1 and 2 Copper loss windage and friction loss core loss only both 1 and 2 Copper loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following machines have highest power factor with respect to magnetizing current? Open slot type machines. Closed slot type machines. Semi closed slot type machine. Any of the above. Open slot type machines. Closed slot type machines. Semi closed slot type machine. Any of the above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a 50 Hz three phase induction motor under full load condition is 725 rpm the number of poles of the motor are ______________. 6. 2. 8. 4. 6. 2. 8. 4. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A motor operates in stable region at which of the following slip? unity slip high slip region both 1 and 2 low slip region unity slip high slip region both 1 and 2 low slip region ANSWER DOWNLOAD EXAMIANS APP
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