Electrical Machines Thin laminations are used in a machine in order to reduce Hysteresis losses Both 1 and 2 Eddy current losses Copper losses Hysteresis losses Both 1 and 2 Eddy current losses Copper losses ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is power factor of a 3 - φ induction motor at no load? Low. Equal to 1. High. Same as full load. Low. Equal to 1. High. Same as full load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements : Interpoles in dc machines 1. reducearmature reaction effects in the interpolar region 2. have the same dimension as main polls 3. have their windings connected in series with the armature 4. have same number of turns as the armature 5. have the polarity same as that of the main pole ahead in a motor From these, the correct statements are 1, 3 and 5 1, 2 and 3 1 and 3 1, 2, 3 and 5 1, 3 and 5 1, 2 and 3 1 and 3 1, 2, 3 and 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a star - delta starting of an IM resistance is inserted in the rotor. applied voltage per stator phase is 57.7 % of a line volt line voltage is 57.7 % of stator voltage. reduced voltage is applied to the stator. resistance is inserted in the rotor. applied voltage per stator phase is 57.7 % of a line volt line voltage is 57.7 % of stator voltage. reduced voltage is applied to the stator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following motors DC excitation is not required? reluctance motor hysteresis motor 3-phase synchronous motor 3-phase synchronous generator reluctance motor hysteresis motor 3-phase synchronous motor 3-phase synchronous generator ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Use of fractional pitch winding results in reduced axial length of the machine. results in reduced leakage reactance. make it stiffer. All of these results in reduced axial length of the machine. results in reduced leakage reactance. make it stiffer. All of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS