Electrical Machines In dc machines, the field system has to be provided on stator unlike synchronous machines Where in it could be on any member, because it reduces field structure iron losses dc machines are comparatively low rating machines. commutator action is not possible otherwise it gives more uniform air-gap flux distribution it reduces field structure iron losses dc machines are comparatively low rating machines. commutator action is not possible otherwise it gives more uniform air-gap flux distribution ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which method is less recommendable for induction motor starting in the industries? Rotor resistance starting. Auto transformer starting. Stator resistance starting. Direct online starting. Rotor resistance starting. Auto transformer starting. Stator resistance starting. Direct online starting. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cogging in induction motor occurs when number of stator teeth - number of rotor teeth = odd number. number of stator teeth - number of rotor teeth = even number. number of stator teeth - number of rotor teeth = 0. number of stator teeth - number of rotor teeth = negative number. number of stator teeth - number of rotor teeth = odd number. number of stator teeth - number of rotor teeth = even number. number of stator teeth - number of rotor teeth = 0. number of stator teeth - number of rotor teeth = negative number. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The effect of ------------------ on main field flux is armature reaction? armature current armature mmf All of these armature flux armature current armature mmf All of these armature flux ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For 250 volt DC Shunt Motor the armature and field resistance are 0.5 ohm and 250 ohm respectively. What will be the back e.m.f. produced when it takes a load current of 21A. 220 V. 280 V. 150 V. 240 V. 220 V. 280 V. 150 V. 240 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Larger values of air flux density is taken while designing IM for both. none. larger bore diameter. larger output. both. none. larger bore diameter. larger output. ANSWER DOWNLOAD EXAMIANS APP
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