Electrical Machines A single phase transformer when supplied from 220 V, 50 Hz has eddy current loss of 50 W. If the transformer is connected voltage of 330 V, 75 Hz, the eddy current loss will be 168.75 W 50 W 75 W 112.5 W 168.75 W 50 W 75 W 112.5 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The breakdown torque of a synchronous motor varies as 1/V 1/V² V² applied voltage V 1/V 1/V² V² applied voltage V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in dc motor results increase in speed. short circuit. decrease in speed. open circuit. increase in speed. short circuit. decrease in speed. open circuit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by s2. sf. sf / 2. f / s. s2. sf. sf / 2. f / s. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase 6 pole 50 Hz induction motor is running at 5% slip.What is the speed of the motor? 900 rpm 1000 rpm 850 rpm 950 rpm 900 rpm 1000 rpm 850 rpm 950 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The main disadvantage(s) of the ward-Leonard system is/are high initial cost. all of above. high maintenance cost. poor overall efficiency. high initial cost. all of above. high maintenance cost. poor overall efficiency. ANSWER DOWNLOAD EXAMIANS APP
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