DC Motors The mechanical power developed in a dc motor is maximum when back emf is equal to _____ the applied voltage. Twice None of the listed here Half One-third Twice None of the listed here Half One-third ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a dc motor is inversely proportional to applied voltage Directly proportional to flux per pole None of the listed here inversely proportional to flux per pole inversely proportional to applied voltage Directly proportional to flux per pole None of the listed here inversely proportional to flux per pole ANSWER DOWNLOAD EXAMIANS APP
DC Motors Ward-Leonard control is basically a Field divertor method Voltage control method Armature resistance control method Field control method Field divertor method Voltage control method Armature resistance control method Field control method ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To support the field coils To reduce the reluctance of the magnetic path To reduce eddy current loss To spread out flux for better uniformity To support the field coils To reduce the reluctance of the magnetic path To reduce eddy current loss To spread out flux for better uniformity ANSWER DOWNLOAD EXAMIANS APP
DC Motors In case the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be Anywhere between 75% and 90% Less than 50% Around 90% 1 Anywhere between 75% and 90% Less than 50% Around 90% 1 ANSWER DOWNLOAD EXAMIANS APP
DC Motors Armature reaction in dc motor is increased When the armature current decreases When the field current increases By interpoles When the armature current increases When the armature current decreases When the field current increases By interpoles When the armature current increases ANSWER DOWNLOAD EXAMIANS APP
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