Electrical Machines What is the increase in the torque expressed as percentage of initial torque, if current drawn by the dc series motor is increased from 10A to 11A? 21% 41% 11% 10% 21% 41% 11% 10% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction depends on which of the following? None of these power factor of load magnitude of load current both 1 and 2 None of these power factor of load magnitude of load current both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine torque depends on which of the following? speed both A and B flux (φ) armature current (I) speed both A and B flux (φ) armature current (I) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Direct-on-line (DOL) starters are not suitable for starting large DC motors, because the starting torque becomes low. the starting current will be enormously high. the motor may run away. the motor may not start. the starting torque becomes low. the starting current will be enormously high. the motor may run away. the motor may not start. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The efficiency of a transformer is mainly dependent on core losses. dielectric losses. copper losses. stray losses. core losses. dielectric losses. copper losses. stray losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of rotating magnetic field of 8 pole 50 Hz induction motor is 3000 rpm 750 rpm 1500 rpm 1000 rpm 3000 rpm 750 rpm 1500 rpm 1000 rpm ANSWER DOWNLOAD EXAMIANS APP
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