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 30 W. 28 W. 25 W. 36 W. 30 W. 28 W. 25 W. 36 W. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the frequency of rotor current of 50 Hz induction motor operating at 4% slip? 2HZ 50Hz 2.5Hz 1 Hz 2HZ 50Hz 2.5Hz 1 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines As compared to an induction motor, the air gap in a DC motor is same. less than 50%. between 50% and 90%. more. same. less than 50%. between 50% and 90%. more. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If starting current of a 3 - Φ induction motor is 5 times the rated current, while rated slip is 4 %, then ratio of starting torque to full load torque is 0.4. 1. 0.8. 0.6. 0.4. 1. 0.8. 0.6. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Stability of a synchronous motor ---------- with the increase in excitation. increases decreases remains unaffected any of the above increases decreases remains unaffected any of the above ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Iron loss in a transformer mainly occurs in transformer insulating oil. winding of transformer. iron made tank of transformer. steel core in transformer. transformer insulating oil. winding of transformer. iron made tank of transformer. steel core in transformer. ANSWER DOWNLOAD EXAMIANS APP
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