Electrical Machines Which of the following machines have highest power factor with respect to magnetizing current? Closed slot type machines. Semi closed slot type machine. Any of the above. Open slot type machines. Closed slot type machines. Semi closed slot type machine. Any of the above. Open slot type machines. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An inverted V curve of synchronous motor shows variation of supply voltage and field current at constant excitation. supply voltage and excitation current at constant load. power factor and supply voltage during hunting. power factor and DC excitation at constant load. supply voltage and field current at constant excitation. supply voltage and excitation current at constant load. power factor and supply voltage during hunting. power factor and DC excitation at constant load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field weakening method is also called as-----------? constant torque control constant current control constant voltage control constant power control constant torque control constant current control constant voltage control constant power control ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC shunt generator builds up to a voltage of 220 V at no load while running at its rated speed. If the speed of the generator is raised by 25% kepping the circuit conditions unaltered, then the Voltage to which the machine would build up will not change and remain at 220 V increase to 1.25 times 220 V increase to a value greater than 1.25 times 220 V increase to value lying between 220 V and 1.25 times 220 V not change and remain at 220 V increase to 1.25 times 220 V increase to a value greater than 1.25 times 220 V increase to value lying between 220 V and 1.25 times 220 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a star - delta starting of an IM resistance is inserted in the rotor. reduced voltage is applied to the stator. applied voltage per stator phase is 57.7 % of a line volt line voltage is 57.7 % of stator voltage. resistance is inserted in the rotor. reduced voltage is applied to the stator. applied voltage per stator phase is 57.7 % of a line volt line voltage is 57.7 % of stator voltage. 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 7%. 0%. 14%. 8.9%. 7%. 0%. 14%. 8.9%. ANSWER DOWNLOAD EXAMIANS APP
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