1
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
A 400 V, 15 kW, 4 pole, 50 Hz, Y-connected induction motor has full load slip of
4%. The output torque of the machine at full load is
2
GATE EE 2003
MCQ (Single Correct Answer)
+2
-0.6
When Stator and Rotor windings of a 2-pole rotating electrical machine are
excited, each would produce a sinusoidal mmf distribution in the air gap with
peak values Fs and Fr respectively. The rotor mmf lags stator mmf by a space
angle $$\delta\;$$ at any instant as shown in Fig. Thus, half of stator and rotor surfaces
will form one pole with the other half forming the second pole. Further, the
direction of torque acting on the rotor can be clockwise or counter-clockwise.
The following Table gives four sets of statements as regards poles and torque.
Select the correct set corresponding to the mmf axes as shown in Figure.
3
GATE EE 2003
MCQ (Single Correct Answer)
+2
-0.6
A single phase induction motor with only the main winding excited would exhibit
the following response at synchronous speed
4
GATE EE 2003
MCQ (Single Correct Answer)
+2
-0.6
A 3-phase Inductor Motor is driving a constant torque load at rated voltage and
frequency. If both voltage and frequency are halved, following statements relate
to the new condition if stator resistance, leakage reactance and core loss are
ignored.
P. The difference between synchronous speed and actual speed remains same
Q. The air-gap flux remains same
R. The stator current remains same
S. The p.u. slip remains same
Among the above, correct statements are
P. The difference between synchronous speed and actual speed remains same
Q. The air-gap flux remains same
R. The stator current remains same
S. The p.u. slip remains same
Among the above, correct statements are
Questions Asked from Induction Machines (Marks 2)
Number in Brackets after Paper Indicates No. of Questions
GATE EE 2024 (1)
GATE EE 2023 (1)
GATE EE 2022 (2)
GATE EE 2018 (1)
GATE EE 2017 Set 2 (1)
GATE EE 2017 Set 1 (1)
GATE EE 2015 Set 1 (1)
GATE EE 2015 Set 2 (1)
GATE EE 2014 Set 2 (1)
GATE EE 2014 Set 1 (1)
GATE EE 2013 (1)
GATE EE 2012 (1)
GATE EE 2011 (1)
GATE EE 2009 (1)
GATE EE 2008 (5)
GATE EE 2007 (4)
GATE EE 2006 (3)
GATE EE 2005 (4)
GATE EE 2004 (3)
GATE EE 2003 (4)
GATE EE 2000 (3)
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits