Electrical Machines The shaft torque of a dc motor is less than the electromagnetic torque because of eddy current losses. hysteresis losses. mechanical losses. ohmic losses. eddy current losses. hysteresis losses. mechanical losses. ohmic losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If iron loss and full load copper loss of any transformer are denoted by Pi and Pc, then the load corresponding to maximum efficiency is given by (Pi / Pc)1.6 × full Load. (Pi / Pc)0.5 × Full Load. (Pi / Pc)2 × full Load. (Pi / Pc) × full Load. (Pi / Pc)1.6 × full Load. (Pi / Pc)0.5 × Full Load. (Pi / Pc)2 × full Load. (Pi / Pc) × full Load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For satisfactory parallel operation of two transformers which of the following conditions is most essential, percentage impedance of all transformers must be same. MVA rating of all transformer inversely proportional to impedance. voltage ratio of all transformers must be same. polarities of all transformers must be same. percentage impedance of all transformers must be same. MVA rating of all transformer inversely proportional to impedance. voltage ratio of all transformers must be same. polarities of all transformers must be same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines We can apply source transformation to voltage source when a resistance is connected to it in 15 HP. 14 HP. 13 HP. 10 HP. 15 HP. 14 HP. 13 HP. 10 HP. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines R1 is the resistance of the primary winding of the transformer. The turn ratio in terms of primary to secondary is K. Then the equivalent resistance of the primary referred to secondary is R1 /K K×R1 K²R1 R1 /K² R1 /K K×R1 K²R1 R1 /K² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC generators has rising V-I characteristics? Compound. Series. Shunt. None of them. Compound. Series. Shunt. None of them. ANSWER DOWNLOAD EXAMIANS APP
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