Electrical Machines If the field of a dc shunt motor gets opened while the motor is running, then the armature current will drop motor will attain dangerously high speed motor will become slow. armature will oscillate about original speed as the mean speed armature current will drop motor will attain dangerously high speed motor will become slow. armature will oscillate about original speed as the mean speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The efficiency of a transformer is mainly dependent on copper losses. core losses. stray losses. dielectric losses. copper losses. core losses. stray losses. dielectric losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The leakage reactance of a 3-phase alternator is determined by performing zero power factor and slip tests. short circuit and slip tests. open circuit and zero power factor tests. open circuit and short circuit tests. zero power factor and slip tests. short circuit and slip tests. open circuit and zero power factor tests. open circuit and short circuit tests. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm? Can be determined. 30 Hz. 20 Hz. 35 Hz. Can be determined. 30 Hz. 20 Hz. 35 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V. 225 V. 222 V. 220 V. 230 V. 225 V. 222 V. 220 V. 230 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a short circuit test on a transformer is performed at 25 V, 50 Hz, the drawn current is I1. If the test is performed by 25 V and 25 Hz and power drawn current is I2, then None of these I1 < I2 I1 > I2 I1 = I2 None of these I1 < I2 I1 > I2 I1 = I2 ANSWER DOWNLOAD EXAMIANS APP
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