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1
GATE EE 1995
MCQ (Single Correct Answer)
+1
-0.3
An inverter capable of supplying a balanced three - phase variable voltage variable frequency output is feeding a three - phase induction motor rated for $$50$$ $$Hz$$ and $$440V.$$ The stator winding resistances of the motor are negligible small. During starting, the current inrush can be avoided without sacrificing the starting torque by suitably applying.
A
Low voltage at rated frequency
B
Low voltage keeping the $$V/f$$ ratio constant
C
Rated voltage at low frequency
D
Rated voltage at rated frequency
2
GATE EE 1994
True or False
+1
-0
A line - commutated inverter changes $$dc$$ voltage to $$ac$$ voltage
A
TRUE
B
FALSE
3
GATE EE 1993
MCQ (Single Correct Answer)
+1
-0.3
When a line commutated converter operates in the inverter mode
A
It draws both real and reactive power from the A.C supply
B
It delivers both real and reactive power to the $$A.C$$ supply
C
It delivers real power to the A.C supply
D
It draws reactive power from the $$A.C$$ supply
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GATE EE Subjects
Electric Circuits
Network Elements Network Theorems Three Phase Circuits Transient Response Sinusoidal Steady State Analysis Graph Theory Two Port Networks
Electromagnetic Fields
Time Varying Fields Electrostatics Magnetostatics
Signals and Systems
Linear Time Invariant Systems Continuous and Discrete Time Signals Continuous Time Signal Fourier Transform Continuous Time Periodic Signal Fourier Series Discrete Time Signal Z Transformation Miscellaneous Continuous Time Signal Laplace Transform Sampling Theorem
Electrical Machines
Induction Machines D.C Machines Synchronous Machines Transformers
Engineering Mathematics
Linear Algebra Differential Equations Calculus Probability and Statistics Numerical Methods Vector Calculus Transform Theory Complex Variable
General Aptitude
Verbal Ability Logical Reasoning Numerical Ability
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
Electrical and Electronics Measurement
Error Analysis and Measurement Basic of Indicating Instruments Potentiometer and Instrument Transformers Measurement of Resistance and A.C Bridges Measurement of Energy and Power Digital Voltmeters Questions Cathode Ray Oscilloscope
Analog Electronics
Diode Circuits and Applications Bjt and Mosfet Biasing Small Signal Modeling Feedback Amplifiers and Oscillator Circuits Operational Amplifier Frequency Response 555 Timer
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
Power Electronics
Choppers and Commutation Techniques Ac Voltage Controllers Single and Three Phase Rectifier Power Semiconductor Devices Inverters
Digital Electronics
Boolean Algebra Logic Gates Combinational Circuits Minimization Logic Families and Memories Sequential Circuits Analog to Digital and Digital to Analog Converter Microprocessor
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