Electrical Machines The speed of a 50 Hz three phase induction motor under full load condition is 725 rpm the number of poles of the motor are ______________. 8. 6. 4. 2. 8. 6. 4. 2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The magnetic field which initially induces emf in the armature in a self excited DC generator is because of residual magnetism. armature reaction. permanent magnets. None of these residual magnetism. armature reaction. permanent magnets. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the reason for stationary armature essential in alternators above 5 KVA? Collecting of large current is simple. Operating cost is less. Insulation requirement is less. All of these Collecting of large current is simple. Operating cost is less. Insulation requirement is less. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Compensating winding are used to rectify the flux density waveform at throughout the air gap. region under main pole. None of these interpole region. throughout the air gap. region under main pole. None of these interpole region. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3 - Φ IM in order to eliminate cogging the number of stator slots must be either (B) or (C). an integral multiple of number of rotor slots. unequal to number of rotor slots and skewed in shape. equal to number of rotor slots. either (B) or (C). an integral multiple of number of rotor slots. unequal to number of rotor slots and skewed in shape. equal to number of rotor slots. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If a DC motor is connected across the AC supply it will Run at lower speed. Not run. Run at normal speed. Burn. Run at lower speed. Not run. Run at normal speed. Burn. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS