Electrical Machines A 3 - Φ, 4 pole, 50 Hz induction motor 4 % slip, calculate frequency of the rotor emf? 50 Hz. 2 Hz. 10 Hz. 3 Hz. 50 Hz. 2 Hz. 10 Hz. 3 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor the 7th harmonic torque may make the motor rotate at (1 / 7)th synchronous speed. This is called cogging. resonance. crawling. harmonics. cogging. resonance. crawling. harmonics. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is the largest conversion device? DC machine Synchronous machine Induction machine All of these DC machine Synchronous machine Induction machine All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of a dc motor the ratio Eb / E is indicative of efficiency. ratio of starting to running torque. ratio of starting to running current. ratio of input to output voltage. efficiency. ratio of starting to running torque. ratio of starting to running current. ratio of input to output voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the full load speed of 3-phase, 50Hz induction motor is 950 rpm, what is its half load speed nearly equals to? 975 rpm 950 rpm 1000 rpm 940 rpm 975 rpm 950 rpm 1000 rpm 940 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field current is reduced to zero the maximum power developed by alternator is 5.46 KW. 1.644 KW. 0.9103 KW. 2.73 KW. 5.46 KW. 1.644 KW. 0.9103 KW. 2.73 KW. ANSWER DOWNLOAD EXAMIANS APP
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