1
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
2
GATE EE 2000
MCQ (Single Correct Answer)
+2
-0.6
The power input to a 415 V, 50 Hz, 6 pole, 3-phase induction motor running at 975 rpm is 40 kW. The stator losses are 1kW and friction and windage losses total 2 kW. The efficiency of the motor is
A
92.5%
B
90%
C
91%
D
88%
3
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
In a constant voltage transformer (CVT), the output voltage remains constant due to
A
capacitor
B
input inductor
C
saturation
D
tapped windings
4
GATE EE 2000
MCQ (Single Correct Answer)
+2
-0.6
A 3-phase, 4-pole squirrel cage induction motor has 36 stator and 28 rotor slots. The number of phases in the rotor is:
A
3
B
9
C
7
D
8