Electrical Machines What is/are the necessary conditions for parallel operation of alternators? Both 1and 2 Terminal voltage is same Speed of alternators should be same Frequency should be same Both 1and 2 Terminal voltage is same Speed of alternators should be same Frequency should be same ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Saving of copper in auto transformer is increased as compared to two winding transformer, when transformation ratio K approaches to zero. unity. two. infinity. zero. unity. two. infinity. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In normal dc machines operating at full-load conditions, the most powerful electromagnet is interpole and compensating windings together interpole winding armature winding field winding interpole and compensating windings together interpole winding armature winding field winding ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Crawling in an induction motor is due to time harmonics in supply. space harmonics produced by winding currents. slip ring rotor. insufficient starting torque. time harmonics in supply. space harmonics produced by winding currents. slip ring rotor. insufficient starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the armature electric current is increased to double its previous value, and the time of commutation is halved, how will the reactance voltage vary? It will becomes four times. It will be halved. It will remain the same. It will be doubled. It will becomes four times. It will be halved. It will remain the same. It will be doubled. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC motor with armature resistance of 0.5 ohms is connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is 250 A. 460 A. 570 A. 340 A. 250 A. 460 A. 570 A. 340 A. ANSWER DOWNLOAD EXAMIANS APP
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