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1
GATE EE 2006
MCQ (Single Correct Answer)
+1
-0.3
In a $$DC$$ machine, which of the following statements is true?
A
Compensating winding is used for neutralizing armature reaction while inter pole winding is used for producing residual flux.
B
Compensating winding is used for neutralizing armature reaction while inter pole winding is used for improving commutation.
C
Compensating winding is used of improving commutation while inter pole winding is used for neutralizing armature reaction.
D
Compensating winding is used for improving commutation while inter pole winding is used for producing residual flux .
2
GATE EE 2002
MCQ (Single Correct Answer)
+1
-0.3
A dc series motor fed from rated supply voltage is overloaded and its magnetic circuit is saturated. The torque-speed characteristic of this motor will be approximately represented by which curve of Fig. GATE EE 2002 Electrical Machines - D.C Machines Question 63 English
A
Curve A
B
Curve B
C
Curve C
D
Curve D
3
GATE EE 2001
MCQ (Single Correct Answer)
+1
-0.3
In case of an armature controlled separately excited dc motor drive with closed loop speed control, an inner current loop is useful because it
A
limits the speed of the motor to a safe value
B
helps in improving the drive energy efficiency
C
limits the peak current of the motor to the permissible value
D
reduces the steady state speed error
4
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
A 1.8° step, 4-phase stepper motor has a total of 40 teeth on 8 poles of stator. The number of rotor teeth for this motor will be
A
40
B
50
C
100
D
80
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Electric Circuits
Network Elements Transient Response Two Port Networks Sinusoidal Steady State Analysis Network Theorems Three Phase Circuits Graph Theory
Electromagnetic Fields
Time Varying Fields Electrostatics Magnetostatics
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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
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Induction Machines D.C Machines Synchronous Machines Transformers
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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
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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
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Diode Circuits and Applications Bjt and Mosfet Biasing Small Signal Modeling Feedback Amplifiers and Oscillator Circuits Operational Amplifier Frequency Response 555 Timer
Control Systems
Time Response Analysis Block Diagram and Signal Flow Graph Polar Nyquist and Bode Plot State Variable Analysis Root Locus Techniques Basics of Control System Routh Hurwitz Stability Controller and Compensator
Power Electronics
Choppers and Commutation Techniques Single and Three Phase Rectifier Power Semiconductor Devices Ac Voltage Controllers 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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