Electrical Machines In dc machines, the space distribution of air-gap flux density wave at no load is rectangular sinusoidal co- sinusoidal flat-topped rectangular sinusoidal co- sinusoidal flat-topped ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator in DC machines can 1. provide half-wave rectification 2. Provide full-wave rectification 3. convert ac to dc 4. Convert dc to ac 5. provide controlled full-wave rectification From these, the correct answer is 1, 2, 3 2, 3 ,5 2, 3, 4, 5 2, 3, 4 1, 2, 3 2, 3 ,5 2, 3, 4, 5 2, 3, 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the space waveform of the air-gap flux distribution affects both the torque and voltage voltage but not the torque torque but not the voltage neither the voltage nor the torque both the torque and voltage voltage but not the torque torque but not the voltage neither the voltage nor the torque ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the field-flux axis and armature-mmf axis are respectively along direct axis and interpolar axis quadrature axis and direct axis direct axis and indirect axis quadrature axis and interpolar axis direct axis and interpolar axis quadrature axis and direct axis direct axis and indirect axis quadrature axis and interpolar axis ANSWER DOWNLOAD EXAMIANS APP
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 unchanged, but Td is zero both Eb and Td are unchanged both Eb and Td are zero Eb is zero, but Td is unchanged Eb is unchanged, but Td is zero both Eb and Td are unchanged both Eb and Td are zero Eb is zero, but Td is unchanged ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS