Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5 Ω and back emf of 200 V is 400 A. 44 A. 440 A. 40 A. 400 A. 44 A. 440 A. 40 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The material used for commutator brushes is mostly copper. cast iron. mica. carbon. copper. cast iron. mica. carbon. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The oscillation in a synchronous motor can be damped out by maintaining constant excitation. oscillation cannot be damped. running the motor on leading power factors. providing damper bars in the rotor pole faces. maintaining constant excitation. oscillation cannot be damped. running the motor on leading power factors. providing damper bars in the rotor pole faces. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In diesel engine, gas engine type of machine contains ___________________ pole type of alternator. cylindrical. none of these. non uniform cylindrical. salient. cylindrical. none of these. non uniform cylindrical. salient. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutation in a DC machine may be explained as a process by virtue of which emf is induced in the armature conductors. how alternate flux affects the main field flux. in which magnetic field is set up. by which electric current in a coil is reversed. by virtue of which emf is induced in the armature conductors. how alternate flux affects the main field flux. in which magnetic field is set up. by which electric current in a coil is reversed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the number of poles required, when the frequency is 50Hz and speed of the motor is 500 rpm? 24 10 5 12 24 10 5 12 ANSWER DOWNLOAD EXAMIANS APP
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