1
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
2
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
3
GATE EE 2001
MCQ (Single Correct Answer)
+2
-0.6
An electric motor with 'constant output power' will have a torque speed
characteristic in the form of a
4
GATE EE 2000
MCQ (Single Correct Answer)
+2
-0.6
A 240 V dc series motor takes 40A when giving its rated output at 1500 rpm. Its
resistance is 0.3 ohms. The value of resistance which must be added to obtain
rated torque at 1000 rpm is:
Questions Asked from Marks 2
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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
Electrical and Electronics Measurement