Electrical Machines Rotor Frequency Online Exam Quiz
Electrical Machines Rotor Frequency GK Quiz. Question and Answers related to Electrical Machines Rotor Frequency. MCQ (Multiple Choice Questions with answers about Electrical Machines Rotor Frequency
For a 4 pole three phase induction motor having synchronous speed of 1500 rpm is operating at 1450rpm. The frequency of the induced emf in rotor is?
Options
A : 100 Hz
B : 50 Hz
C : 150 Hz
D : 0 Hz
A properly shunted center zero galvanometer is connected in the rotor circuit of a 6-pole, 50 hz wound rotor induction motor. If the makes 90 complete oscillations in one minute, the rotor speed is?
Options
A : 1000 rpm
B : 970 rpm
C : 950 rpm
D : 930 rpm
A three phase, 50 Hz induction motor has a full load speed of 1440 rpm. Speed of the stator filed with respect to stator structure is?
Options
A : 157 rad/s
B : 150 rad/s
C : 6.28 rad/s
D : 145 rad/s
A three phase, 50 Hz induction motor has a full load speed of 1440 rpm. Speed of the rotor field w.r.t. rotor structure is?
Options
A : 157 rad/s
B : 150 rad/s
C : 6.28 rad/s
D : 145 rad/s
A three phase, 50 Hz induction motor has a full load speed of 1440 rpm. Speed of the stator field revolving rotor structure is?
Options
A : 157 rad/s
B : 150 rad/s
C : 6.28 rad/s
D : 145 rad/s
A three phase, 50 Hz induction motor has a full load speed of 1440 rpm. Rotor frequency is?
Options
A : 2 Hz
B : 50 Hz
C : 52 Hz
D : 58 Hz
A three phase, 50 Hz induction motor has a full load speed of 1440 rpm. The number of poles of this motor is?
Options
A : 4
B : 6
C : 5
D : 2
A three phase, 50 Hz induction motor has a full load speed of 1440 rpm. The full load slip will be?
Options
A : 4%
B : 5%
C : 2.4%
D : 3%
A 4-pole, 3-phase slip ring induction motor is used as a frequency changer. Its stator is excited from 3-phase, 50 Hz supply. A load requiring 3-phase, 20 Hz supply is connected to the star-connected rotor through three slip-rings of SRIM. At what two speeds the prime mover should drive the rotor of this SRIM?
Options
A : 900 rpm
B : 600 rpm
C : 1500 rpm
D : 0
For a 4-pole, 3-phase induction motor the rotor speed found is 2100 rpm at 50 Hz. Then the phase sequence of the emf generated will be?
Options
A : acb
B : abc
C : no emf will be induced
D : cba
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