DC Motors The mechanical power developed in a dc motor is maximum when back emf is equal to _____ the applied voltage. One-third Twice Half None of the listed here One-third Twice Half None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors The dirction of rotation of a dc series motor can be changed by Either of Interchanging field or Interchanging supply Interchanging supply terminals None of the listed here Interchanging field terminals Either of Interchanging field or Interchanging supply Interchanging supply terminals None of the listed here Interchanging field terminals ANSWER DOWNLOAD EXAMIANS APP
DC Motors The back emf in a dc motor ______ None of the listed here Opposes the applied voltage Aids the armature current Aids the applied voltage None of the listed here Opposes the applied voltage Aids the armature current Aids the applied voltage ANSWER DOWNLOAD EXAMIANS APP
DC Motors The commutating pole winding is connected in None of the listed here Series with the armature Parallel with the armature Series-parallel with the armature None of the listed here Series with the armature Parallel with the armature Series-parallel with the armature ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Too much brush tension Bent shaft Worn bearings Open armature coil Too much brush tension Bent shaft Worn bearings Open armature coil ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following losses are significantly reduced by laminating the core of a D.C. generator? Hysteresis losses Copper losses Eddy current losses Windage losses Hysteresis losses Copper losses Eddy current losses Windage losses ANSWER DOWNLOAD EXAMIANS APP
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