1
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
Instrument transformers are known to introduce magnitude and phase errors in measurements. These are primarily due to
A
improper connections on the primary side
B
measurement errors inherent in the meter connected to the transformer secondary
C
open and short circuit parameters of the instrument transformers
D
none
2
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
The compensating winding in a dc machine
A
is located in armature slots for compensation of the armature reaction
B
is located on commutating poles for improving the commutation
C
is located on pole shoes for avoiding the flashover at the commutator surface
D
is located on poles shoes to avoid the sparking at the brushes.
3
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
4
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
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