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1
GATE EE 2011
MCQ (Single Correct Answer)
+1
-0.3
A three-phase, salient pole synchronous motor is connected to an infinite bus. It is operated at no load a normal excitation. The field excitation of the motor is first reduced to zero and then increased in reverse direction gradually. Then the armature current
A
Increases continuously
B
First increases and then decreases steeply
C
First decreases and then increases steeply
D
Remains constant
2
GATE EE 2008
MCQ (Single Correct Answer)
+1
-0.3
In a stepper motor, the detent torque means
A
minimum of the static torque with phase winding excited.
B
maximum of the static torque with phase winding excited.
C
minimum of the static torque with phase winding unexcited
D
maximum of the static torque with the phase winding unexcited
3
GATE EE 2008
MCQ (Single Correct Answer)
+1
-0.3
Distributed winding and short chording employed in AC machines will result in
A
increase in $$emf$$ and reduction in harmonics
B
reduction in $$emf$$ and increase in harmonics
C
increase in both $$emf$$ and harmonics
D
reduction in both $$emf$$ and harmonics
4
GATE EE 2007
MCQ (Single Correct Answer)
+1
-0.3
A three phase synchronous motor connected to ac mains is running at full load and unity power factor. If its shaft load is reduced by half, with field current held constant, its new power factor will be
A
unity
B
leading
C
lagging
D
dependent on machine parameters
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Electric Circuits
Network Elements Transient Response Two Port Networks Sinusoidal Steady State Analysis Network Theorems Three Phase Circuits Graph Theory
Electrical Machines
Synchronous Machines Transformers D.C Machines Induction Machines
Engineering Mathematics
Vector Calculus Calculus Transform Theory Probability and Statistics Differential Equations Linear Algebra Numerical Methods Complex Variable
Signals and Systems
Continuous Time Signal Fourier Transform Miscellaneous Discrete Time Signal Z Transformation Continuous Time Periodic Signal Fourier Series Continuous and Discrete Time Signals Continuous Time Signal Laplace Transform Linear Time Invariant Systems Sampling Theorem
Power Electronics
Choppers and Commutation Techniques Single and Three Phase Rectifier Power Semiconductor Devices Ac Voltage Controllers Inverters
Power System Analysis
Parameters and Performance of Transmission Lines Power Generation Cost Power System Stability Symmetrical Components and Symmetrical and Unsymmetrical Faults Circuit Breaker Switch Gear and Protection Per Unit System Load Flow Studies High Voltage Dc Transmission Generating Power Station
Digital Electronics
Boolean Algebra Logic Gates Combinational Circuits Minimization Logic Families and Memories Sequential Circuits Analog to Digital and Digital to Analog Converter Microprocessor
Analog Electronics
Diode Circuits and Applications Bjt and Mosfet Biasing Small Signal Modeling Feedback Amplifiers and Oscillator Circuits Operational Amplifier Frequency Response 555 Timer
Electromagnetic Fields
Time Varying Fields Electrostatics Magnetostatics
Control Systems
Controller and Compensator Root Locus Techniques Polar Nyquist and Bode Plot State Variable Analysis Basics of Control System Time Response Analysis Routh Hurwitz Stability Block Diagram and Signal Flow Graph
Electrical and Electronics Measurement
Potentiometer and Instrument Transformers Measurement of Resistance and A.C Bridges Measurement of Energy and Power Cathode Ray Oscilloscope Digital Voltmeters Questions Basic of Indicating Instruments Error Analysis and Measurement
General Aptitude
Verbal Ability Logical Reasoning Numerical Ability
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