Electrical Machines It is an advisable to use auto transformer if the transformation ratio is 0.5. Greater than 1. near to 1. 0.25. 0.5. Greater than 1. near to 1. 0.25. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines which of the following type of brush and their application is/are correct All of these electro graphite → large ratings copper graphite → low voltage high current density carbon brush → normal ratings All of these electro graphite → large ratings copper graphite → low voltage high current density carbon brush → normal ratings ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If dimension of all the parts of a synchorous generator and the number of field and armature turns are double, then generated voltage will change by a factor of 2. 8. 4. 1. 2. 8. 4. 1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. Find the speed of stator magnetic field with respect to rotor? zero 30 rpm 1500 rpm 1470 rpm zero 30 rpm 1500 rpm 1470 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, the armature reaction results in magnetization of inter poles. magnetization of leading and demagnetization of trailing pole tip. demagnetization of centers of poles. demagnetization of leading & magnetization of trailing pole tip. magnetization of inter poles. magnetization of leading and demagnetization of trailing pole tip. demagnetization of centers of poles. demagnetization of leading & magnetization of trailing pole tip. 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 15.6 Nm 15.92 Nm 16.55 Nm 15.28 Nm 15.6 Nm 15.92 Nm 16.55 Nm 15.28 Nm ANSWER DOWNLOAD EXAMIANS APP
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