Electrical Machines The synchronous speed of an induction motor will be increased by decreasing of frequency. increasing of frequency. increasing number of poles. speed can not be increased. decreasing of frequency. increasing of frequency. increasing number of poles. speed can not be increased. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The wound rotor type IM is used for____________ speed operation. minimum. constant. maximum. variable. minimum. constant. maximum. variable. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is 2% 4% 5% 25% 2% 4% 5% 25% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Regenerative braking is not found in which motor? Induction motor. DC series. DC shunt. DC compound. Induction motor. DC series. DC shunt. DC compound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor Increase. Remains same. None of these. Decrease. Increase. Remains same. None of these. Decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The flux involved in the emf equation of a transformer has average value. rms value. maximum value. total value. average value. rms value. maximum value. total value. ANSWER DOWNLOAD EXAMIANS APP
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