1
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
Ratio of the rotor reactance X to the rotor resistance R for a two-phase servomotor
A
is equal to that of a normal induction motor
B
is less than that of a normal induction motor
C
is greater than that of a normal induction motor
D
may be less or greater than that of a normal induction motor
2
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
A 1.8° step, 4-phase stepper motor has a total of 40 teeth on 8 poles of stator. The number of rotor teeth for this motor will be
A
40
B
50
C
100
D
80
3
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:
A
6 ohms
B
5.7 ohms
C
2.2 ohms
D
1.9 ohms
4
GATE EE 2000
MCQ (Single Correct Answer)
+2
-0.6
A permanent magnet dc commutator motor has a no load speed of 6000 rpm when connected to a 120V dc supply. The armature resistance is 2.5 ohms and other losses may be neglected. The speed of the motor with supply voltage of 60V developing a torque 0.5 Nm, is:
A
3000 rpm
B
2673 rpm
C
2836 rpm
D
5346 rpm
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Medical
NEET
Graduate Aptitude Test in Engineering
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CBSE
Class 12