Electrical Machines In DC machine shape of armature MMF wave is? Triangular and directed towards brush axis. Saddle shape. Peaky in nature. Triangular and directed towards main pole. Triangular and directed towards brush axis. Saddle shape. Peaky in nature. Triangular and directed towards main pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines No load primary current in a transformer leads the applied voltage somewhat less than 90Ã& lags behind applied voltage somewhat less than 90à leads the applied voltage by exactly 90Â& lags behind applied voltage by exactly 90Â&am leads the applied voltage somewhat less than 90Ã& lags behind applied voltage somewhat less than 90à leads the applied voltage by exactly 90Â& lags behind applied voltage by exactly 90Â&am ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Interpoles in a DC motor must be Shunt excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature. Shunt excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature. Series excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature. Series excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature. Shunt excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature. Shunt excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature. Series excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature. Series excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two 3-phase AC generators are such that one has twice the linear dimensions of the other. The field windings of each are excited to give identical sinusoidal air-gap flux density waveform. Both have the same number of stator slots and identical winding patterns. The conductor/slot in a big generator is K times that of the smaller one. The value of K to get equal no load voltage at same frequency is 4. 1/4. 1/2. 8. 4. 1/4. 1/2. 8. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In 3 - Φ induction motor some times copper bars are placed deep in the rotor to reduce copper loss. improve starting torque. improve power factor. improve efficiency. reduce copper loss. improve starting torque. improve power factor. improve efficiency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor drawing an armature current of Ia is operating under saturated magnetic conditions. The torque developed in the motor is proportional to I/Ia2 1/Ia Ia Ia2 I/Ia2 1/Ia Ia Ia2 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS