1
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
For a $$1.8$$ degree, $$2$$-phase bipolar stepper motor, the stepping rate is $$100$$ steps/second. The rotational speed of the motor in $$rpm$$ is
A
$$15$$
B
$$30$$
C
$$60$$
D
$$90$$
2
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
The synchronous speed for the seventh space harmonic $$mmf$$ wave of a $$3$$-phase, $$8$$ pole, $$50$$ $$Hz$$ induction machine is
A
$$107.14$$ rpm in forward direction
B
$$107.14$$ rpm in reverse direction
C
$$5250$$ rpm in forward direction
D
$$5250$$ rpm in reverse direction
3
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
A rotating electrical machine having its self-inductances of both the stator and the rotor windings, independent of the rotor position will be definitely not develop
A
starting torque
B
synchronizing torque
C
hysteresis torque
D
reluctance torque
4
GATE EE 2004
MCQ (Single Correct Answer)
+1
-0.3
The following motor definitely has a permanent magnet rotor
A
DC commutator motor
B
Brushless dc motor
C
Stepper motor
D
Reluctance motor
EXAM MAP