DC Motors In a dc motor if the back emf is absent Motor will not run at all Motor will burn Motor will run at very slow speed Motor will run at very high speed Motor will not run at all Motor will burn Motor will run at very slow speed Motor will run at very high speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors In dc machines fractional pitch winding is used To reduce the sparking To increase the generated emf To improve cooling To reduce the generated emf To reduce the sparking To increase the generated emf To improve cooling To reduce the generated emf ANSWER DOWNLOAD EXAMIANS APP
DC Motors The commutating winding is basically used in a dc machine None of the listed here To control the speed of machine To improve commutation To reduce armature reaction None of the listed here To control the speed of machine To improve commutation To reduce armature reaction ANSWER DOWNLOAD EXAMIANS APP
DC Motors One D.C. motor drives another D.C. motor. The second D.C. motor when excited and driven Also runs as a motor comes to stop after sometime Does not run as a generator None of these Runs as a generator Also runs as a motor comes to stop after sometime Does not run as a generator None of these Runs as a generator ANSWER DOWNLOAD EXAMIANS APP
DC Motors The dirction of rotation of a dc series motor can be changed by None of the listed here Interchanging supply terminals Either of Interchanging field or Interchanging supply Interchanging field terminals None of the listed here Interchanging supply terminals Either of Interchanging field or Interchanging supply Interchanging field terminals ANSWER DOWNLOAD EXAMIANS APP
DC Motors The greatest percentage of power loss in a dc motor is due to Core loss Copper loss Friction loss Windage loss Core loss Copper loss Friction loss Windage loss ANSWER DOWNLOAD EXAMIANS APP
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