Electrical Machines In synchronous generator, inverted V curve is drawn between field current on Y-axis and power factor on X-axis field current on Y-axis and armature current on X-axis field current on X-axis and power factor on Y-axis field current on X-axis and armature current on Y-axis field current on Y-axis and power factor on X-axis field current on Y-axis and armature current on X-axis field current on X-axis and power factor on Y-axis field current on X-axis and armature current on Y-axis ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator in DC machines can 1. provide half-wave rectification 2. Provide full-wave rectification 3. convert ac to dc 4. Convert dc to ac 5. provide controlled full-wave rectification From these, the correct answer is 1, 2, 3 2, 3, 4 2, 3 ,5 2, 3, 4, 5 1, 2, 3 2, 3, 4 2, 3 ,5 2, 3, 4, 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following load normally needs starting torque more than rated torque? Blowers. Conveyers. Centrifugal pumps. Air compressors. Blowers. Conveyers. Centrifugal pumps. Air compressors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A generator may loose residual magnetism due to any of these. over excitation. vibrations. heating. any of these. over excitation. vibrations. heating. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will none of these. increase. remains same. Decrease.d none of these. increase. remains same. Decrease.d ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor used in hair dryers? Split phase IM. Synchronous motors. Shaded pole IM. Cage induction motor. Split phase IM. Synchronous motors. Shaded pole IM. Cage induction motor. ANSWER DOWNLOAD EXAMIANS APP
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