Electrical Machines For pure resistive load what is the armature reaction? magnetization cross magnetization demagnetization All of these magnetization cross magnetization demagnetization All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The main disadvantage(s) of the ward-Leonard system is/are all of above. poor overall efficiency. high maintenance cost. high initial cost. all of above. poor overall efficiency. high maintenance cost. high initial cost. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines On what factors the speed of dc motor depends? All of these. Armature current Ia. Applied voltage. Field flux. All of these. Armature current Ia. Applied voltage. Field flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC motor under constant terminal voltage what is the relation between torque (Te) and power (P) T∝ P³ T∝ P T is independent of P T∝ P² T∝ P³ T∝ P T is independent of P T∝ P² ANSWER DOWNLOAD EXAMIANS APP
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 commutator action is not possible otherwise dc machines are comparatively low rating machines. it reduces field structure iron losses it gives more uniform air-gap flux distribution commutator action is not possible otherwise dc machines are comparatively low rating machines. it reduces field structure iron losses it gives more uniform air-gap flux distribution ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Current in a coil undergoing commutation is not able to get reversed completely by the end of commutation period. It is due to None of these coil resistance. armature emf. reactance voltage induced in the coil. None of these coil resistance. armature emf. reactance voltage induced in the coil. ANSWER DOWNLOAD EXAMIANS APP
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