Electrical Machines The supply voltage to an induction motor is reduced by 10%. By what percentage, approximately, will the maximum torque decrease? 19% 10% 5% 40% 19% 10% 5% 40% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In V/f speed control of 3-phase induction motor, with increase in frequency, the slip at which maximum torque occurs None of these decrease. increase. either of these. None of these decrease. increase. either of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The short circuit test on a transformer is conducted to obtain copper losses. hysteresis loss. core loses only. eddy current loss. copper losses. hysteresis loss. core loses only. eddy current loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The material used for commutator brushes is mostly copper. mica. carbon. cast iron. copper. mica. carbon. cast iron. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature coil is short circuited by brushes when it lies along neutral axis. in any of above positions. along field axis. in none of above positions. along neutral axis. in any of above positions. along field axis. in none of above positions. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC motor with armature resistance of 0.5 ohms is connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is 340 A. 570 A. 460 A. 250 A. 340 A. 570 A. 460 A. 250 A. ANSWER DOWNLOAD EXAMIANS APP
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