Electrical Machines In a single phase transformer the magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short circuited, the input power factor is 2/√5 1/√2 1/3 1/√5 2/√5 1/√2 1/3 1/√5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the residual magnetism is of the order of 2.5 %. 10 %. 15 %. 20 %. 2.5 %. 10 %. 15 %. 20 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Inter pole winding is connected in-------------------------- ? parallel with armature series with armature series with main poles parallel with main poles parallel with armature series with armature series with main poles parallel with main poles ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hunting in a synchronous motor takes place motor is under loaded. when power factor is unity. when load varies. when supply voltage fluctuates. motor is under loaded. when power factor is unity. when load varies. when supply voltage fluctuates. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole DC generator runs at 750 rpm and generate an emf of 240 V. The armature is wave wound and has 792 conductors. If the total flux from each pole is 0.0145 Wb. What is the leakage co-efficient? 1.5. 1.4. 1.2. 1.8. 1.5. 1.4. 1.2. 1.8. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC generator will not build up voltage any one of above. if field resistance is more than critical resistance. due to wrong direction of rotation. if it has lost residual magnetism. any one of above. if field resistance is more than critical resistance. due to wrong direction of rotation. if it has lost residual magnetism. ANSWER DOWNLOAD EXAMIANS APP
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