1
GATE EE 2011
MCQ (Single Correct Answer)
+2
-0.6
A 220 V, DC shunt motor is operating at a speed of 1440 rpm. The armature
resistance is 1.0 $$\Omega$$ and armature current is 10 A. of the excitation of the machine
is reduced by 10%, the extra resistance to be put in the armature circuit to
maintain the same speed and torque will be
2
GATE EE 2010
MCQ (Single Correct Answer)
+2
-0.6
A separately excited DC motor runs at 1500 rpm under no-load with 200 V applied
to the armature. The field voltage is maintained at its rated value. The speed of
the motor, when it delivers a torque of 5 Nm, is 1400 rpm as shown in the figure.
The rotational losses and armature reaction are neglected.
For the motor to deliver a torque of 2.5 Nm at 1400 rpm the armature voltage to
be applied is
3
GATE EE 2010
MCQ (Single Correct Answer)
+2
-0.6
A separately excited DC motor runs at 1500 rpm under no-load with 200 V applied
to the armature. The field voltage is maintained at its rated value. The speed of
the motor, when it delivers a torque of 5 Nm, is 1400 rpm as shown in the figure.
The rotational losses and armature reaction are neglected.
The armature resistance of the motor is,
4
GATE EE 2009
MCQ (Single Correct Answer)
+2
-0.6
Figure shows the extended view of a $$2$$ pole $$dc$$ machine with $$10$$ armature conductors. Normal brush positions are shown by $$A$$ and $$B,$$ placed at the inter polar axis. If the brushes are now shifted, in the direction of rotation to $$A'$$ and $$B'$$ as shown, the voltage waveform $${V_{A'B'}}$$ will resemble
Questions Asked from D.C Machines (Marks 2)
Number in Brackets after Paper Indicates No. of Questions
GATE EE 2024 (1)
GATE EE 2022 (1)
GATE EE 2018 (1)
GATE EE 2017 Set 2 (2)
GATE EE 2017 Set 1 (2)
GATE EE 2016 Set 1 (1)
GATE EE 2015 Set 1 (2)
GATE EE 2015 Set 2 (1)
GATE EE 2014 Set 2 (1)
GATE EE 2014 Set 3 (1)
GATE EE 2014 Set 1 (1)
GATE EE 2012 (1)
GATE EE 2011 (1)
GATE EE 2010 (2)
GATE EE 2009 (1)
GATE EE 2008 (2)
GATE EE 2006 (1)
GATE EE 2005 (3)
GATE EE 2004 (2)
GATE EE 2003 (1)
GATE EE 2002 (1)
GATE EE 2001 (1)
GATE EE 2000 (2)
GATE EE 1999 (1)
GATE EE 1998 (2)
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