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1
GATE EE 2018
MCQ (Single Correct Answer)
+1
-0.3
In a salient pole synchronous motor, the developed reluctance torque attains the maximum value when the load angle in electrical degrees is
A
0
B
45
C
60
D
90
2
GATE EE 2017 Set 1
Numerical
+1
-0
A three-phase, 50Hz, star-connected cylindrical-rotor synchronous machine is running as a motor. The machine is operated from a 6.6 kV grid and draws current at unity power factor (UPF). The synchronous reactance of the motor is 30 Ω per phase. The load angle is $$30^\circ$$. The power delivered to the motor in kW is _______.
Your input ____
3
GATE EE 2017 Set 2
MCQ (Single Correct Answer)
+1
-0.3
If a synchronous motor is running at a leading power factor, its excitation induced voltage (Er) is
A
equal to terminal voltage Vt
B
higher than the terminal voltage Vt
C
less than terminal voltage Vt
D
dependent upon supply voltage Vt
4
GATE EE 2014 Set 3
MCQ (Single Correct Answer)
+1
-0.3
In a synchronous machine, hunting is predominantly damped by
A
mechanical losses in the rotor
B
iron losses in the rotor
C
copper losses in the stator
D
copper losses in the rotor
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GATE EE Subjects

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Electric Circuits
Three Phase Circuits Two Port Networks Network Theorems Sinusoidal Steady State Analysis Graph Theory Transient Response Network Elements
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
Power Semiconductor Devices Ac Voltage Controllers Single and Three Phase Rectifier Choppers and Commutation Techniques Inverters
Power System Analysis
Power System Stability Load Flow Studies Parameters and Performance of Transmission Lines High Voltage Dc Transmission Circuit Breaker Symmetrical Components and Symmetrical and Unsymmetrical Faults Per Unit System Power Generation Cost Switch Gear and Protection Generating Power Station
Digital Electronics
Analog to Digital and Digital to Analog Converter Microprocessor Sequential Circuits Logic Gates Minimization Logic Families and Memories Boolean Algebra Combinational Circuits
Analog Electronics
Operational Amplifier 555 Timer Small Signal Modeling Bjt and Mosfet Biasing Diode Circuits and Applications Feedback Amplifiers and Oscillator Circuits Frequency Response
Electromagnetic Fields
Time Varying Fields Electrostatics Magnetostatics
Control Systems
Time Response Analysis State Variable Analysis Basics of Control System Root Locus Techniques Block Diagram and Signal Flow Graph Controller and Compensator Polar Nyquist and Bode Plot Routh Hurwitz Stability
Electrical and Electronics Measurement
Basic of Indicating Instruments Error Analysis and Measurement Cathode Ray Oscilloscope Measurement of Resistance and A.C Bridges Digital Voltmeters Questions Potentiometer and Instrument Transformers Measurement of Energy and Power
General Aptitude
Verbal Ability Logical Reasoning Numerical Ability
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