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1
GATE EE 2006
MCQ (Single Correct Answer)
+1
-0.3
A synchronous generator is feeding a zero power factor (lagging) load at rated current the armature reaction is
A
magnetizing
B
demagnetizing
C
cross magnetizing
D
Ineffective
2
GATE EE 2005
MCQ (Single Correct Answer)
+1
-0.3
In relation to the synchronous machines, which one of the following statements is false?
A
In salient pole machines, the direct-axis synchronous reactance is greater than the quadrature-axis synchronous reactance
B
The damper bars help the synchronous motor self-start
C
Short circuit ratio is the ratio of the field current required to produce the rated voltage on open circuit to the rated armature current
D
The V-curve of a synchronous motor represents the variation in the armature current with field excitation, at a given output power
3
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
4
GATE EE 2004
MCQ (Single Correct Answer)
+1
-0.3
For a given stepper motor, the following torque has the highest numerical value.
A
Detent torque
B
Pull-in torque
C
Pull-out torque
D
Holding torque
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GATE EE Subjects
Electromagnetic Fields
Time Varying Fields Electrostatics Magnetostatics
Signals and Systems
Continuous and Discrete Time Signals Linear Time Invariant Systems Continuous Time Signal Fourier Transform Discrete Time Signal Z Transformation Continuous Time Signal Laplace Transform Sampling Theorem Continuous Time Periodic Signal Fourier Series Miscellaneous
Engineering Mathematics
Calculus Vector Calculus Linear Algebra Differential Equations Probability and Statistics Transform Theory Complex Variable Numerical Methods
General Aptitude
Verbal Ability Logical Reasoning Numerical Ability
Power Electronics
Choppers and Commutation Techniques Single and Three Phase Rectifier Power Semiconductor Devices Ac Voltage Controllers Inverters
Power System Analysis
Per Unit System Power Generation Cost Power System Stability Symmetrical Components and Symmetrical and Unsymmetrical Faults Circuit Breaker Switch Gear and Protection Load Flow Studies High Voltage Dc Transmission Generating Power Station Parameters and Performance of Transmission Lines
Analog Electronics
Diode Circuits and Applications Frequency Response Bjt and Mosfet Biasing 555 Timer Feedback Amplifiers and Oscillator Circuits Operational Amplifier Small Signal Modeling
Control Systems
Block Diagram and Signal Flow Graph Polar Nyquist and Bode Plot State Variable Analysis Basics of Control System Routh Hurwitz Stability Time Response Analysis Root Locus Techniques Controller and Compensator
Digital Electronics
Boolean Algebra Logic Gates Combinational Circuits Minimization Logic Families and Memories Sequential Circuits Analog to Digital and Digital to Analog Converter Microprocessor
Electrical Machines
Induction Machines D.C Machines Synchronous Machines Transformers
Electric Circuits
Network Elements Network Theorems Three Phase Circuits Transient Response Sinusoidal Steady State Analysis Graph Theory Two Port Networks
Electrical and Electronics Measurement
Basic of Indicating Instruments Error Analysis and Measurement Measurement of Resistance and A.C Bridges Measurement of Energy and Power Digital Voltmeters Questions Potentiometer and Instrument Transformers Cathode Ray Oscilloscope
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