DC Motors One D.C. motor drives another D.C. motor. The second D.C. motor when excited and driven 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 Also runs as a motor comes to stop after sometime Does not run as a generator ANSWER DOWNLOAD EXAMIANS APP
DC Motors If the supply voltage for a D.C. motor is increased, which of the following will decrease? Operating speed Starting torque All of these Full-load current Operating speed Starting torque All of these Full-load current ANSWER DOWNLOAD EXAMIANS APP
DC Motors The commutating pole winding is connected in Series with the armature None of the listed here Parallel with the armature Series-parallel with the armature Series with the armature None of the listed here Parallel with the armature Series-parallel with the armature ANSWER DOWNLOAD EXAMIANS APP
DC Motors The torque developed by a dc motor is directly proportional to None of the listed here Armature resistance × armature current Armature resistance × applied voltage Flux per pole × armature current None of the listed here Armature resistance × armature current Armature resistance × applied voltage Flux per pole × armature current ANSWER DOWNLOAD EXAMIANS APP
DC Motors As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit A resistance is connected parallel to the armature Armature is temporarily open circuited A resistance is connected in series with armature A high value resistor is connected across the field winding A resistance is connected parallel to the armature Armature is temporarily open circuited A resistance is connected in series with armature A high value resistor is connected across the field winding ANSWER DOWNLOAD EXAMIANS APP
DC Motors D.C. generators are normally designed for maximum efficiency around All of these Full load Rated r.p.m. Rated voltage All of these Full load Rated r.p.m. Rated voltage ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS