1
GATE EE 2013
MCQ (Single Correct Answer)
+2
-0.6
A 4-pole induction motor, supplied by a slightly unbalanced three-phase 50Hz source, is rotating at 1440 rpm. The electrical frequency in Hz of the induced negative sequence current in the rotor is
A
100
B
98
C
52
D
48
2
GATE EE 2012
MCQ (Single Correct Answer)
+2
-0.6
The locked rotor current in a 3-phase, star connected 15 kW, 4-pole, 230 V, 50 Hz induction motor at rated conditions is 50 A. Neglecting losses and magnetizing current, the approximate locked rotor line current drawn when the motor is connected to a 236 V, 57 Hz supply is
A
58.5 A
B
45.0 A
C
42.7 A
D
55.6 A
3
GATE EE 2011
MCQ (Single Correct Answer)
+2
-0.6
A three-phase 440V, 6 pole, 50Hz, squirrel cage induction motor is running at a slip of 5%. The speed of stator magnetic field to rotor magnetic field and speed of rotor with respect to stator magnetic field are
A
zero, 50 rpm
B
zero, 955 rpm
C
1000 rpm, -5 rpm
D
1000 rpm, 955 rpm
4
GATE EE 2009
MCQ (Single Correct Answer)
+2
-0.6
A $$200$$ $$V,$$ $$50$$ $$Hz,$$ single-phase induction motor has the following connection diagram and winding orientations shown. $$MM'$$ is the axis of the main stator winding $$\left( {{M_1}{M_2}} \right)$$ and $$AA'$$ is that of the auxiliary winding $$\left( {{A_1}{A_2}} \right).$$ Directions of the winding axis indicate direction of flux when currents in the windings are in the directions shown. Parameters of each winding are indicated. When switch $$S$$ is closed, the motor GATE EE 2009 Electrical Machines - Induction Machines Question 6 English
A
rotates clockwise
B
rotates anticlockwise
C
does not rotate
D
rotates momentarily and comes to a halt
GATE EE Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12