Electrical Machines Slip speed is the difference of synchronous speed and actual rotor speed. difference of actual rotor speed and synchronous speed. half of the sum of synchronous and rotor speeds. sum of synchronous and rotor speeds. difference of synchronous speed and actual rotor speed. difference of actual rotor speed and synchronous speed. half of the sum of synchronous and rotor speeds. sum of synchronous and rotor speeds. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The torque developed in IM is nearly proportional to V2. V. 1 / V. 1 / V2. V2. V. 1 / V. 1 / V2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Current in a coil undergoing commutation is not able to get reversed completely by the end of commutation period. It is due to None of these reactance voltage induced in the coil. coil resistance. armature emf. None of these reactance voltage induced in the coil. coil resistance. armature emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the space distribution of air-gap flux density wave at no load is flat-topped rectangular co- sinusoidal sinusoidal flat-topped rectangular co- sinusoidal sinusoidal ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In salient pole synchronous machine, maximum power occurs at a load angle of Greater than 90° less than 90° 0° 90° Greater than 90° less than 90° 0° 90° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC shunt machine generates 250 V on open circuit at 1000 RPM. Armature resistance is 0.5 Ω, field resistance 250 Ω. When running as a motor takes 4 A at 250 V. Calculate the efficiency when running as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4%. 72.5% 78.5% 82.5% 67.5% 72.5% 78.5% 82.5% 67.5% ANSWER DOWNLOAD EXAMIANS APP
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