Electrical Machines Tap changer is generally provided in earthing transformer. power transformer. current transformer. voltage transformer. earthing transformer. power transformer. current transformer. voltage transformer. 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 K×R1 R1 /K K²R1 R1 /K² K×R1 R1 /K K²R1 R1 /K² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC motor with armature resistance of 0.5 ohms connected directly to a 220 Volt supply. If the armature is stationary then the current flowing through the armature is 570 A. 440 A. 250 A. 340 A. 570 A. 440 A. 250 A. 340 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as cogging. air gap. crawling. relative speed. cogging. air gap. crawling. relative speed. 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 Which of the following DC motors has almost constant speed over their full load range? none of these. Series. Shunt. Compound (cummolative). none of these. Series. Shunt. Compound (cummolative). ANSWER DOWNLOAD EXAMIANS APP
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