1
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
The armature resistance of a permanent magnet dc motor is 0.8 $$\Omega$$. At no load, the
motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The
efficiency of the motor while it is operating on load at 1500 rpm drawing a
current of 3.5 A form the same source will be
2
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
A 8 pole, DC generator has a simplex wave-wound armature containing 32 coils
of 6 turns each. Its flux per pole is 0.06 Wb. The machine is running at 250 rpm.
The induced armature voltage is
3
GATE EE 2003
MCQ (Single Correct Answer)
+2
-0.6
A dc series motor driving an electric train faces a constant power load. It is
running at rated speed and rated voltage. If the speed has to be brought down to
0.25 p.u. the supply voltage has to be approximately brought down to
4
GATE EE 2002
MCQ (Single Correct Answer)
+2
-0.6
A 200 V, 2000 rpm, 10A, separately excited d.c. motor has an armature resistance
of 2 $$\Omega$$. Rated d.c. voltage is applied to both the armature and field winding of the
motor. If the armature drawn 5A from the source, the torque developed by the
motor is
Questions Asked from D.C Machines (Marks 2)
Number in Brackets after Paper Indicates No. of Questions
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 2 (1)
GATE EE 2015 Set 1 (2)
GATE EE 2014 Set 3 (1)
GATE EE 2014 Set 2 (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
Electric Circuits
Electromagnetic Fields
Signals and Systems
Electrical Machines
Engineering Mathematics
General Aptitude
Power System Analysis
Electrical and Electronics Measurement
Analog Electronics
Control Systems
Power Electronics