DC Motors The mechanical power developed in a dc motor is maximum when back emf is equal to _____ the applied voltage. Half One-third None of the listed here Twice Half One-third None of the listed here Twice ANSWER DOWNLOAD EXAMIANS APP
DC Motors The commutating winding is basically used in a dc machine To control the speed of machine To reduce armature reaction None of the listed here To improve commutation To control the speed of machine To reduce armature reaction None of the listed here To improve commutation ANSWER DOWNLOAD EXAMIANS APP
DC Motors Differentially compound D.C. motors can find applications requiring High starting torque Variable speed Low starting torque Frequent on-off cycles High starting torque Variable speed Low starting torque Frequent on-off cycles ANSWER DOWNLOAD EXAMIANS APP
DC Motors In which of the following tests only one motor is required? Hopkinson's test Field's test Brake test Swinburne's test Hopkinson's test Field's test Brake test Swinburne's test ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following methods gives the greatest braking torque? Plugging Rheostatic braking Regenerative braking None of the listed here Plugging Rheostatic braking Regenerative braking None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors When the speed of dc motor increases, its armature current Decreases Increases None of the listed here Remains same Decreases Increases None of the listed here Remains same ANSWER DOWNLOAD EXAMIANS APP
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