Electrical Machines
Induction Machines
Marks 1Marks 2
Synchronous Machines
Marks 1Marks 2Marks 5
1
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
Under no load condition, if the applied voltage to an induction motor is reduced from the rated voltage to half the rated value,
A
the speed decreases and the stator current increases
B
both the speed and the stator current decrease
C
the speed and the stator current remain practically constant
D
there is negligible change in the speed but the stator current decreases
2
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve
A
low starting torque
B
quick acceleration
C
high efficiency
D
reduced size
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)
+2
-0.6
A 400 V, 15 kW, 4 pole, 50 Hz, Y-connected induction motor has full load slip of 4%. The output torque of the machine at full load is
A
1.66 Nm
B
95.50 Nm
C
99.47 Nm
D
624.73 Nm
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits
Electrical and Electronics Measurement