Electrical Machines In case of IM the torque is directly proportional to slip2. inversely proportional to slip. inversely proportional to √slip. directly proportional to slip. directly proportional to slip2. inversely proportional to slip. inversely proportional to √slip. directly proportional to slip. 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 59.2%. 48.0%. 57.1%. 88.8%. 59.2%. 48.0%. 57.1%. 88.8%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field divertor method of speed control of a DC series motor gives speed above rated one due to reduction of Field current. Armature current. Line current. None of above. Field current. Armature current. Line current. None of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. What is the operating frequency, if the load is 600 MW? 48 Hz 48.5 Hz 50 Hz 45 HZ 48 Hz 48.5 Hz 50 Hz 45 HZ ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Use of fractional pitch winding results in reduced axial length of the machine. make it stiffer. results in reduced leakage reactance. All of these results in reduced axial length of the machine. make it stiffer. results in reduced leakage reactance. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Current in a coil undergoing commutation is not able to get reversed completely by the end of commutation period. It is due to coil resistance. reactance voltage induced in the coil. armature emf. None of these coil resistance. reactance voltage induced in the coil. armature emf. None of these ANSWER DOWNLOAD EXAMIANS APP
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