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 50 W 75 W 168.75 W 112.5 W 50 W 75 W 168.75 W 112.5 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Motors for fans and pumps are selected in the rpm range 1440 to 2880. 500 to 720. 720 to 920. 375 to 500. 1440 to 2880. 500 to 720. 720 to 920. 375 to 500. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Synchronous condensers are used to improve the power factor improve starting torque All of these reduce hunting improve the power factor improve starting torque All of these reduce hunting ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC motor under constant terminal voltage what is the relation between torque (Te) and power (P) T is independent of P T∝ P² T∝ P T∝ P³ T is independent of P T∝ P² T∝ P T∝ P³ ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc machine, 1. physically, the brush axis is along the direct axis 2. physically, the brush axis is along the interpolar axis 3. schematically, the brush axis is along the direct axis 4. schematically, the brush axis is along the quadrature axis 5. armaturemmf is directed along the brush axis From these, the correct statements are 2, 4, 5 1, 4,5 1 , 3, 5 2, 3, 5 2, 4, 5 1, 4,5 1 , 3, 5 2, 3, 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slip of an induction motor normally does not depend on which of the following? Synchronous speed. Core loss component. Rotor speed. Shaft torque. Synchronous speed. Core loss component. Rotor speed. Shaft torque. ANSWER DOWNLOAD EXAMIANS APP
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