Electrical Machines The short circuit test on a transformer is conducted to obtain core loses only. eddy current loss. copper losses. hysteresis loss. core loses only. eddy current loss. copper losses. hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor has a rotor resistance of 0.002 Ω / phase. If the resistance is increased to 0.004 Ω / phase then the maximum torque will remain unaltered increase by 200% reduced to half increase by 100% remain unaltered increase by 200% reduced to half increase by 100% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hunting in a synchronous motor takes place when supply voltage fluctuates. motor is under loaded. when load varies. when power factor is unity. when supply voltage fluctuates. motor is under loaded. when load varies. when power factor is unity. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The induction motor shaft is made of aluminium. mild steel. cast iron. stainless steel. aluminium. mild steel. cast iron. stainless steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of a permanent magnet dc motor is 0.8 Ohm. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A from the same source will be 88.8%. 57.1%. 59.2%. 48.0%. 88.8%. 57.1%. 59.2%. 48.0%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To eliminate 5th harmonic in the induced voltage phase breadth should be 18° 30° 72° 36° 18° 30° 72° 36° ANSWER DOWNLOAD EXAMIANS APP
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