1
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
A
96V
B
192V
C
384V
D
768V
2
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
A
0.75 p.u.
B
0.5 p.u.
C
0.25 p.u.
D
0.125 p.u.
3
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
A
4.30 Nm
B
4.77 Nm
C
0.45 Nm
D
0.50 Nm
4
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
A
straight line through the origin
B
straight line parallel to the speed axis
C
circle about the origin
D
rectangular hyperbola
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Graduate Aptitude Test in Engineering
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