Electrical Machines When a synchronous motor is running at synchronous speed, the damper winding produces damping torqe. both 1 and 2. no torque. eddy current torque. damping torqe. both 1 and 2. no torque. eddy current torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The field system of an alternator is usually excited 3 - Φ, 50 Hz and 400 V. 250 / 250 V DC. 110 / 220 V AC. 230 V AC. 3 - Φ, 50 Hz and 400 V. 250 / 250 V DC. 110 / 220 V AC. 230 V AC. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm. Find the rotor efficiency? 95% 96% 94% 92% 95% 96% 94% 92% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine the armature mmf is stationary with respect to armature. rotating with respect to field poles. stationary with respect to field poles. rotating with respect to field poles as well as armature. stationary with respect to armature. rotating with respect to field poles. stationary with respect to field poles. rotating with respect to field poles as well as armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To get the speed of DC motor more than normal without wastage of electrical energy _____________ is used. rheostatic control. none of above. any of above method. Ward Leonard control. rheostatic control. none of above. any of above method. Ward Leonard control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Essential conditions for two DC generators are connecting for parallel operation is/are terminal voltage should be same. both A and B. polarities should be same. rating of generators should be same. terminal voltage should be same. both A and B. polarities should be same. rating of generators should be same. ANSWER DOWNLOAD EXAMIANS APP
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