Electrical Machines A 3-phase, 50Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor output power? 1920W 1450W 1820W 2000W 1920W 1450W 1820W 2000W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single-phase transformer has its maximum efficiency at 60 percent of full load. At full load copper loss will be less than core loss. equal to core loss. more than core loss. zero. less than core loss. equal to core loss. more than core loss. zero. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer oil is used as a coolant. both A and B. an insulator. inert medium. a coolant. both A and B. an insulator. inert medium. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Secondary winding of an auto transformer is also called compensating winding. tertiary winding. common winding. damping winding. compensating winding. tertiary winding. common winding. damping winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a 3 - Φ, 4 pole, 50 Hz IM rotating at full load speed of 1440 rpm, calculate speed of rotor field with respect to rotor structure and stator structure respectively? 1440, 1500. 60, 1440. 50, 1500. 60, 1500. 1440, 1500. 60, 1440. 50, 1500. 60, 1500. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, 1. reactance voltage is proportional to armature current 2.reactance voltage is proportional to core length 3.reactance voltage is due to self-flux of the coil undergoing commutation 4. armature-cross flux is neutralized by interpolar flux 5. interpolarmmf is more than armature mmf in the interpolar zone From these, the correct answer is 1, 2, 5 1, 3, 5 2, 3, 4 1, 2, 3, 4 1, 2, 5 1, 3, 5 2, 3, 4 1, 2, 3, 4 ANSWER DOWNLOAD EXAMIANS APP
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