DC Motors A series motor will over speed when The armature circuit is opened. Load is removed The field is opened The load is increase The armature circuit is opened. Load is removed The field is opened The load is increase ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc motor if the back emf is absent Motor will run at very high speed Motor will burn Motor will not run at all Motor will run at very slow speed Motor will run at very high speed Motor will burn Motor will not run at all Motor will run at very slow speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following loss in a D.C. generator varies significantly with the load current? Armature copper loss Windage loss Field copper loss None of these Armature copper loss Windage loss Field copper loss None of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors The torque developed by a dc motor is directly proportional to Flux per pole × armature current Armature resistance × armature current None of the listed here Armature resistance × applied voltage Flux per pole × armature current Armature resistance × armature current None of the listed here Armature resistance × applied voltage ANSWER DOWNLOAD EXAMIANS APP
DC Motors The main disadvantage of the Ward-Leonard control method is Low efficiency at high loads All of these High initial cost High maintenance cost Low efficiency at high loads All of these High initial cost High maintenance cost ANSWER DOWNLOAD EXAMIANS APP
DC Motors The compensating winding is connected in Series with armature None of the listed here Parallel with armature Series-parallel with armature Series with armature None of the listed here Parallel with armature Series-parallel with armature ANSWER DOWNLOAD EXAMIANS APP
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