Electrical Machines The interpoles in dc machines have a tapering shape in order to reduce the saturation in the interpole increase the acceleration of commutation economise on the material required for interpoles and their windings reduce the overall weight reduce the saturation in the interpole increase the acceleration of commutation economise on the material required for interpoles and their windings reduce the overall weight ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Sparkless commutation can be achieved by employing high resistance carbon brushes. any one or more of the above methods. compensating winding. inter poles. high resistance carbon brushes. any one or more of the above methods. compensating winding. inter poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator with a diameter of 50 cm rotating at 1000 rpm. For a brush width of 1.5 cm, find the time of commutation in ms. 0.649. 0.573. 0.512. 0.443. 0.649. 0.573. 0.512. 0.443. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following alternators contain large number of poles? Aame in both alternators. None of these Hydro alternators. Turbo alternators. Aame in both alternators. None of these Hydro alternators. Turbo alternators. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A separately-excited dc motor has an armature resistance of 0.5 Ω. It runs off a 250 V dc supply Drawing an armature current of 20 A at 1500 rpm. The torque developed for an armature current Of 10 A, for the same field current, will be 16.55 Nm 15.28 Nm 15.6 Nm 15.92 Nm 16.55 Nm 15.28 Nm 15.6 Nm 15.92 Nm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The main purpose of providing tertiary winding in a three phase transformer is to interconnect three voltage systems. None of these to suppress harmonic and unbalance in voltage. to carry extra load. to interconnect three voltage systems. None of these to suppress harmonic and unbalance in voltage. to carry extra load. ANSWER DOWNLOAD EXAMIANS APP
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