Electrical Machines Which of the following will vary the maximum torque? rotor reactance X both 1 and 2 None of these rotor resistance R rotor reactance X both 1 and 2 None of these rotor resistance R ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case the conditions for maximum power for DC motor are established, the efficiency of the motor will be Less than 50 % Around 100 %. Around 90 % Any where between 75 % and 90 %. Less than 50 % Around 100 %. Around 90 % Any where between 75 % and 90 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The main disadvantage(s) of the ward-Leonard system is/are high initial cost. all of above. high maintenance cost. poor overall efficiency. high initial cost. all of above. high maintenance cost. poor overall efficiency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase slip ring induction motor is wound for 4 poles on stator and 6 poles on the rotor. When 3-phase balanced voltage source at 50 Hz is applied, it will run at 1500 rpm 750rpm 1000 rpm zero speed 1500 rpm 750rpm 1000 rpm zero speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the necessary conditions for voltage build up in self excited generator? Field winding should be properly connected to armature winding. Field winding resistance should be less than critical resistance. Poles should contain residual flux. All of these Field winding should be properly connected to armature winding. Field winding resistance should be less than critical resistance. Poles should contain residual flux. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which transformer, the tertiary winding is used? Star - star Delta - star Star - delta Delta - delta Star - star Delta - star Star - delta Delta - delta ANSWER DOWNLOAD EXAMIANS APP
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