DC Motors In a dc motor constant torque is produced due to Pole shoes End plates Commutator Rotor laminations Pole shoes End plates Commutator Rotor laminations ANSWER DOWNLOAD EXAMIANS APP
DC Motors The starting resistance of a DC motor is generally Infinitely large Around 500 Ω Low 1000 Ω Infinitely large Around 500 Ω Low 1000 Ω ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following loss in a D.C. generator varies significantly with the load current? None of these Armature copper loss Windage loss Field copper loss None of these Armature copper loss Windage loss Field copper loss ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. machines the residual magnetism is of the order of 2 to 3 percent 50 to 75 percent 10 to 15 percent 20 to 25 percent 2 to 3 percent 50 to 75 percent 10 to 15 percent 20 to 25 percent 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 friction and windage losses in a dc motor depends upon Flux Field and armature resistance Armature current Speed Flux Field and armature resistance Armature current Speed ANSWER DOWNLOAD EXAMIANS APP