Electrical Machines If an additional resistance is connected in series with a DC motor operating at rated speed, the speed of the motor will Remain unaltered. Oscillate around the normal speed. Increase. Reduce. Remain unaltered. Oscillate around the normal speed. Increase. Reduce. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip exists in none of above. in both machines. induction motor. synchronous motor. none of above. in both machines. induction motor. synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In 3 - Φ induction motor some times copper bars are placed deep in the rotor to improve power factor. improve starting torque. improve efficiency. reduce copper loss. improve power factor. improve starting torque. improve efficiency. reduce copper loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The supply voltage to an induction motor is reduced by 10%. By what percentage, approximately, will the maximum torque decrease? 5% 10% 40% 19% 5% 10% 40% 19% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer core is laminated to reduce copper loss. eddy current loss. hysteresis loss. both 1 and 2. copper loss. eddy current loss. hysteresis loss. both 1 and 2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase, 2 KV alternator has an armature resistance of 0.8 ohms and 4.94 ohms respectively. The voltage regulation of the alternator at 100 a load 0.8 loading power factor is 14%. 7%. 8.9%. 0%. 14%. 7%. 8.9%. 0%. ANSWER DOWNLOAD EXAMIANS APP
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