Electrical Machines In case the conditions for maximum power for DC motor are established, the efficiency of the motor will be Any where between 75 % and 90 %. Less than 50 % Around 100 %. Around 90 % Any where between 75 % and 90 %. Less than 50 % Around 100 %. Around 90 % ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in dc motor results open circuit. increase in speed. short circuit. decrease in speed. open circuit. increase in speed. short circuit. decrease in speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum efficiency will occur, when copper loss is_______to iron loss? greater than any of the above equal to less than greater than any of the above equal to less than ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What will be the eddy current loss if the supply frequency of a transformer becomes double? Four times. Eight times. Remains same. Doubled. Four times. Eight times. Remains same. Doubled. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the excitation of normally operating unloaded, salient pole synchronous motor suddenly gets disconnected, it continues to run as a induction motor. DC motor. switched reluctance motor. variable reluctance motor. induction motor. DC motor. switched reluctance motor. variable reluctance motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC cumulatively compounded motor delivers rated load torque at rated speed. If the series field is short-circuited, then the armature current and speed will both decrease both increase increase and decrease respectively decrease and increase respectively both decrease both increase increase and decrease respectively decrease and increase respectively ANSWER DOWNLOAD EXAMIANS APP
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