Electrical Machines The brush-axis of a bipolar dc motor is rotated by 90°. The effect of this rotation on the back emf Eband the torque developed Tdwould be such that Eb is zero, but Td is unchanged both Eb and Td are unchanged both Eb and Td are zero Eb is unchanged, but Td is zero Eb is zero, but Td is unchanged both Eb and Td are unchanged both Eb and Td are zero Eb is unchanged, but Td is zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer core is laminated to reduce eddy current loss. both 1 and 2. hysteresis loss. copper loss. eddy current loss. both 1 and 2. hysteresis loss. copper loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The function of field regulator in a DC compound motor is to none of above. vary the armature resistance. control field current. limit the armature current. none of above. vary the armature resistance. control field current. limit the armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor having 8 poles runs at 727.5 rpm. If the supply frequency is 50Hz, the emf in the rotor will have a frequency of 51.5Hz 2.5Hz 48.5Hz 1.5Hz 51.5Hz 2.5Hz 48.5Hz 1.5Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 1-phase induction motor, if the forward torque slip is S, what is the backward torque slip? 1-S S 1/S 2-S 1-S S 1/S 2-S ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Open circuit in a transformer is prefered with direct current high frequency supply rated transformer current rated transformer voltage direct current high frequency supply rated transformer current rated transformer voltage ANSWER DOWNLOAD EXAMIANS APP
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