NSEJS Previous Year Papers 2008-2009
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NSEJS Previous Year Papers 2010-2011
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Gate ee 2007 with solutions
This document contains 20 multiple choice questions from GATE EE 2007 exam. It provides the questions, solutions and explanations for each question in detail. The key details are:
- The document contains one mark multiple choice questions on topics like transistors, voltage regulators, transformer connections, generator scheduling, HVDC systems, electric field distribution, op-amps, system stability, time variant systems, sampling, matrix rank, thyristor converters etc.
- For each question, the solutions clearly explain the concepts and calculations involved in arriving at the correct option. Relevant circuit diagrams and equations are included.
- The level of detail in the solutions and explanations is quite high as it is aimed to help students prepare for competitive exams
Unit commitment
This document provides an overview of optimization techniques applied to solve the unit commitment problem for a 10 unit power system. It describes the objective function and constraints of the unit commitment problem formulation. It then briefly introduces several common optimization techniques used to solve unit commitment, including simulated annealing, harmony search, and multi-agent evolutionary programming incorporating a priority list. The document presents cost comparisons of applying different optimization techniques to the standard 10 unit test system, including tabular and graphical summaries of results from research papers. It concludes with references.
synchronous generators
1) A synchronous generator produces AC voltage through induction in its stator windings caused by a rotating magnetic field generated by its rotor. The rotor contains field windings energized by DC current to produce the magnetic field.
2) The internal generated voltage of the generator depends on its rotational speed and magnetic flux. However, armature reaction and impedance effects cause the terminal voltage to differ from the internal voltage under load conditions.
3) Equivalent circuits are used to model synchronous generators, representing the internal generated voltage and impedance effects. Phasor diagrams illustrate the relationship between voltages and currents under different load power factors.
Electrical analogous of mechanical translational system
This document discusses electrical analogies of mechanical translational systems. There are two types of analogies: force-voltage and force-current. Force-voltage analogy models mechanical equations as electrical mesh equations. Force-current analogy models mechanical equations as electrical node equations. Two example problems are presented to illustrate drawing the analogous electrical circuits and verifying with mesh/node equations. Homework is assigned to practice drawing and verifying additional analogous circuits.
maxwells equation
Maxwell's Equations describe the fundamental interactions between electric and magnetic fields. They consist of four equations:
1) Gauss's law relates electric charge density to electric field.
2) Gauss's law for magnetism states that magnetic monopoles have not been observed.
3) Faraday's law describes how a changing magnetic field induces an electric field.
4) Ampere-Maxwell law relates electric current and changing electric fields to magnetic fields.
Together, Maxwell's Equations show that changing electric and magnetic fields propagate as electromagnetic waves moving at the speed of light.
Distribution System Voltage Drop and Power Loss Calculation
Distribution System Voltage Drop and Power Loss
Calculation
Comparison of Overhead Versus Underground System
Power Loss Calculation,Voltage Drop Calculation
Unit commitment in power system
The document discusses unit commitment in power systems. Unit commitment involves determining which generating units to operate and when to operate them in order to meet the changing electricity demand at the lowest possible production cost while satisfying operational constraints. It describes the unit commitment problem and various constraints like minimum up/down times, ramp rates, reserve requirements, and start-up costs that make it more complex than economic dispatch. It provides a simple example to illustrate the concepts.
Recommended
NSEJS Previous Year Papers 2010-2011
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Gate ee 2007 with solutions
This document contains 20 multiple choice questions from GATE EE 2007 exam. It provides the questions, solutions and explanations for each question in detail. The key details are:
- The document contains one mark multiple choice questions on topics like transistors, voltage regulators, transformer connections, generator scheduling, HVDC systems, electric field distribution, op-amps, system stability, time variant systems, sampling, matrix rank, thyristor converters etc.
- For each question, the solutions clearly explain the concepts and calculations involved in arriving at the correct option. Relevant circuit diagrams and equations are included.
- The level of detail in the solutions and explanations is quite high as it is aimed to help students prepare for competitive exams
Unit commitment
This document provides an overview of optimization techniques applied to solve the unit commitment problem for a 10 unit power system. It describes the objective function and constraints of the unit commitment problem formulation. It then briefly introduces several common optimization techniques used to solve unit commitment, including simulated annealing, harmony search, and multi-agent evolutionary programming incorporating a priority list. The document presents cost comparisons of applying different optimization techniques to the standard 10 unit test system, including tabular and graphical summaries of results from research papers. It concludes with references.
synchronous generators
1) A synchronous generator produces AC voltage through induction in its stator windings caused by a rotating magnetic field generated by its rotor. The rotor contains field windings energized by DC current to produce the magnetic field.
2) The internal generated voltage of the generator depends on its rotational speed and magnetic flux. However, armature reaction and impedance effects cause the terminal voltage to differ from the internal voltage under load conditions.
3) Equivalent circuits are used to model synchronous generators, representing the internal generated voltage and impedance effects. Phasor diagrams illustrate the relationship between voltages and currents under different load power factors.
Electrical analogous of mechanical translational system
This document discusses electrical analogies of mechanical translational systems. There are two types of analogies: force-voltage and force-current. Force-voltage analogy models mechanical equations as electrical mesh equations. Force-current analogy models mechanical equations as electrical node equations. Two example problems are presented to illustrate drawing the analogous electrical circuits and verifying with mesh/node equations. Homework is assigned to practice drawing and verifying additional analogous circuits.
maxwells equation
Maxwell's Equations describe the fundamental interactions between electric and magnetic fields. They consist of four equations:
1) Gauss's law relates electric charge density to electric field.
2) Gauss's law for magnetism states that magnetic monopoles have not been observed.
3) Faraday's law describes how a changing magnetic field induces an electric field.
4) Ampere-Maxwell law relates electric current and changing electric fields to magnetic fields.
Together, Maxwell's Equations show that changing electric and magnetic fields propagate as electromagnetic waves moving at the speed of light.
Distribution System Voltage Drop and Power Loss Calculation
Distribution System Voltage Drop and Power Loss
Calculation
Comparison of Overhead Versus Underground System
Power Loss Calculation,Voltage Drop Calculation
Unit commitment in power system
The document discusses unit commitment in power systems. Unit commitment involves determining which generating units to operate and when to operate them in order to meet the changing electricity demand at the lowest possible production cost while satisfying operational constraints. It describes the unit commitment problem and various constraints like minimum up/down times, ramp rates, reserve requirements, and start-up costs that make it more complex than economic dispatch. It provides a simple example to illustrate the concepts.
Mini_Project
The document describes a mini project report on modeling and simulation of a solar photovoltaic system with Perturb and Observe (P&O) maximum power point tracking (MPPT) control. The project involves designing models of the key system components including the solar PV panel, MPPT controller, DC-DC boost converter, three-phase three-leg inverter and 12-pulse auto-connected transformer. Simulations will then be carried out and results analyzed to study the performance of the system.
Load flow studies
The document discusses load flow studies in power systems. Load flow analysis is important for planning future expansion and determining optimal operation of existing power systems. It provides key information like voltage magnitude and phase angle at each bus and real and reactive power flows. Bus classification depends on which quantities are specified - P,Q buses specify real and reactive power, P,V buses specify real power and voltage magnitude, and the slack bus specifies voltage magnitude and phase angle. Nodal admittance matrix formulation and numerical load flow examples are also presented.
Power System Planning
Power system planning involves studies ranging from 1-10 years to determine generation, transmission, and distribution infrastructure needs. Key aspects of transmission planning include load forecasting, generation expansion planning to meet load, substation expansion planning, network expansion planning to transmit power from generators to loads, and reactive power planning. Both static planning looking at single time periods and dynamic planning considering multiple time periods simultaneously are used. Transmission planning is interconnected with generation planning, as transmission systems deliver power from generators to loads.
ELECTROSTATICS:Coulomb's law, Electric field & problems
This document provides an overview of the topics covered in the unit on electrostatics, including:
- Coulomb's law, electric fields, Gauss's law and applications.
- Electric potential, conductors and dielectrics in static electric fields.
- Boundary conditions and capacitance of parallel, cylindrical, and spherical capacitors.
- Electrostatic energy and Poisson's and Laplace's equations.
- Current density, Ohm's law, electromotive force, and Kirchhoff's laws.
It then goes on to define Coulomb's law, the electric field intensity, and the principle of superposition. Examples of calculating electric force and field due to point charges are also provided
Load flow study
this ppt is about what is load flow study, importance, need, bus classification, static method and approximate method of load flow study
Load curve
The load curve shows the variation in load on an electrical power station over time. It provides important information such as average daily load, maximum demand, number of generating units needed, and operation scheduling. The demand factor is the ratio of maximum demand to connected load and is used to determine plant equipment capacity. The load factor is the ratio of average load to maximum demand and indicates plant utilization.
POWER SYSTEM OPERATION AND CONTROL. load forecasting - introduction, methodo...
POWER SYSTEM OPERATION AND CONTROL. load forecasting - introduction, methodology & estimation of average and trend terms. PREPARED BY: JOBIN ABRAHAM.
Coulomb's law and its applications
Coulomb's law describes the electrostatic force between two point charges. It states that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. The law leads to the concept of electric field as a vector field that describes the electromagnetic force exerted on charged objects. Electric field lines are a graphical representation of the electric field, with properties like direction, strength, and superposition. Coulomb's law and electric fields can be applied to understand phenomena like dipoles, parallel plates in a capacitor, and spherically symmetric charge distributions.
Initial and final condition for circuit
Initial and final condition for circuit
Explain the transient response of a RC circuit
As the capacitor stores energy when there is:
a transition in a unit step function source, u(t-to)
or a voltage or current source is switched into the circuit.
Explain the transient response of a RL circuit
As the inductor stores energy when there is:
a transition in a unit step function source, u(t-to)
or a voltage or current source is switched into the circuit.
RC Circuit
RL Circuit
Electrostatics
This document provides a summary of Lecture 2 on electrostatics. It introduces fundamental concepts such as electric charge, Coulomb's law, electric field, electric potential, and the relationship between electric field and electric potential. Continuous distributions of charge such as volume, surface, and line charges are also discussed. Key equations for calculating electric fields and potentials from these various charge distributions are presented.
Special Electrical Machines
This document discusses special electrical machines, specifically permanent magnet synchronous motors (PMSM). It describes PMSM as a brushless DC motor with permanent magnets on the rotor that create magnetic poles instead of a field winding. The document outlines the basic construction and working principle of PMSM, noting that a rotating magnetic field from the stator interacts with the permanent rotor magnets to produce torque. Applications mentioned include servo drives, robotics, traction systems, and railway transportation.
Principles of power systems v. k. mehta and r. mehta
This document provides a summary of the Scilab codes included in the Scilab Textbook Companion for the textbook "Principles of Power Systems" by V. K. Mehta And R. Mehta. It includes the book description, a numbering policy for the Scilab codes, and a list of 22 chapters and over 200 Scilab codes included in the companion with brief descriptions of the codes. The codes provide solutions to examples from the textbook to demonstrate power system engineering concepts.
Electrical Power Systems Synchronous Generator
Here are the steps to solve this problem:
a) Given: Generator is 6 pole, 50 Hz
Using the synchronous speed formula: nm = 120f/P
nm = 120*50/6 = 1000 RPM
b) Terminal voltage at different power factors:
1) Given load: Ia = 60 A, PF = 0.8 lagging
Using phasor diagram: Vt = Ea - IaXs
Ea = Vt + IaXs = 480 + 60*1 = 540 V
Vt = 540*cos(cos-1(0.8)) = 480 V
2) PF = 1.0
Vt = Ea = 540 V
3) PF
Single phase induction motor
The single-phase motor, which are designed to operate from a single-phase supply, are manufactured in a large number of types to perform a wide variety of useful services in home, offices, factories, workshops and in a business establishments etc.
Small motors, particularly in the frictional kW sizes are better known than any other. In fact, most of the new products of the manufacturers of space vehicles, aircrafts, business machines and power tools etc. have been possible due to of the advances made in the design of frictional kW motors. Since the performance requirements of the various applications differ so widely, the motor manufacturing industry has developed many different types of such motors, each being designed to meet specific demands.
Single-phase motors may be classified as under, depending on their construction and method of starting:
1. Induction Motors (split-phase, capacitor and shaded-pole etc.)
2. Repulsion Motors (sometime called inductive-series motor)
3. AC Series Motor, and
4. Un-excited Synchronous Motors
SINGLE PHASE INDUCTION MOTORS AND SPECIAL MACHINES
Constructional details – Double revolving field theory – Equivalent circuit – Starting methods – Role of induction motor in industries and household appliances – Reluctance motor - Servo motor - Stepper motor - Universal motor - Switched reluctance motor - Linear induction motor – Linear Synchronous motor.
re-derivation of maxwell's equations regarding electromagnetism
The document discusses Maxwell's equations and their applications. It begins by listing Maxwell's equations and the constitutive relations. It then provides several examples of using Maxwell's equations, including deriving the diffusion equation from Maxwell's equations, solving the diffusion equation for magnetic flux density near a vacuum-copper interface, deriving the continuity equation from Maxwell's equations, and explaining Poynting's theorem. The document also discusses representing Maxwell's equations in integral and phasor forms and provides examples of calculating power, frequency, and Poynting vectors using these representations.
state space representation,State Space Model Controllability and Observabilit...
State Variables of a Dynamical System
State Variable Equation
Why State space approach
Block Diagram Representation Of State Space Model
Controllability and Observability
Derive Transfer Function from State Space Equation
Time Response and State Transition Matrix
Eigen Value
Power System Stability Introduction
Objectives: This course will provide a comprehensive overview of power system stability and control problems. This includes the basic concepts, physical aspects of the phenomena, methods of analysis, the integration of MATLAB and SINULINK in the analysis of power system .
Course Content: 1. Power System Stability: Introduction
2. Stability Analysis: Swing Equation
3. Models for Stability Studies
4. Steady State Stability
5. Transient Stability
6. Multimachine Transient Stability
7. Power System Control: Introduction
8. Load Frequency Control
9. Automatic generation Control
10. Reactive Power Control
Principles of Power Systems V.K Mehta Complete Book - Chapter 2
In this modern world, the dependence on
electricity is so much that it has become a
part and parcel of our life. The ever increas-
ing use of electric power for domestic, commer-
cial and industrial purposes necessitates to pro-
vide bulk electric power economically. This is
achieved with the help of suitable power produc-
ing units, known as Power plants or Electric
power generating stations. The design of a power
plant should incorporate two important aspects.
Firstly, the selection and placing of necessary
power-generating equipment should be such so
that a maximum of return will result from a mini-
mum of expenditure over the working life of the
plant. Secondly, the operation of the plant should
be such so as to provide cheap, reliable and
continuous service. In this chapter, we shall
focus our attention on various types of generat-
ing stations with special reference to their advan-
tages and disadvantages.
SYNCHRONOUS MACHINES
Physical Description
Mathematical Model
Park's "dqo" transportation
Steady-state Analysis
phasor representation in d-q coordinates
link with network equations
Definition of "rotor angle"
Representation of Synchronous Machines in Stability Studies
neglect of stator transients
magnetic saturation
Simplified Models
Synchronous Machine Parameters
Reactive Capability Limits
Consists of two sets of windings:
3 phase armature winding on the stator distributed with centres 120° apart in space
field winding on the rotor supplied by DC
Two basic rotor structures used:
salient or projecting pole structure for hydraulic units (low speed)
round rotor structure for thermal units (high speed)
Salient poles have concentrated field windings; usually also carry damper windings on the pole face. Round rotors have solid steel rotors with distributed windings
Nearly sinusoidal space distribution of flux wave shape obtained by:
distributing stator windings and field windings in many slots (round rotor);
shaping pole faces (salient pole)
NSEJS Previous Year Papers 2009-2010
nsejs 2013 question paper fiitjee,
nsejs 2014 question paper,
nsejs question paper 2016,
nsejs preparation books,
nsejs syllabus,
nsejs 2016 question paper pdf,
nsejs 2013 question paper pdf,
nsejs 2012 question paper,
nsejs previous year papers,
NSEJS Olympiad Sample & Previous Year Papers,
NSEJS Previous Year Papers 2012-2013
nsejs 2013 question paper fiitjee,
nsejs 2014 question paper,
nsejs question paper 2016,
nsejs preparation books,
nsejs syllabus,
nsejs 2016 question paper pdf,
nsejs 2013 question paper pdf,
nsejs 2012 question paper,
nsejs previous year papers,
NSEJS Olympiad Sample & Previous Year Papers,
More Related Content
What's hot
Mini_Project
The document describes a mini project report on modeling and simulation of a solar photovoltaic system with Perturb and Observe (P&O) maximum power point tracking (MPPT) control. The project involves designing models of the key system components including the solar PV panel, MPPT controller, DC-DC boost converter, three-phase three-leg inverter and 12-pulse auto-connected transformer. Simulations will then be carried out and results analyzed to study the performance of the system.
Load flow studies
The document discusses load flow studies in power systems. Load flow analysis is important for planning future expansion and determining optimal operation of existing power systems. It provides key information like voltage magnitude and phase angle at each bus and real and reactive power flows. Bus classification depends on which quantities are specified - P,Q buses specify real and reactive power, P,V buses specify real power and voltage magnitude, and the slack bus specifies voltage magnitude and phase angle. Nodal admittance matrix formulation and numerical load flow examples are also presented.
Power System Planning
Power system planning involves studies ranging from 1-10 years to determine generation, transmission, and distribution infrastructure needs. Key aspects of transmission planning include load forecasting, generation expansion planning to meet load, substation expansion planning, network expansion planning to transmit power from generators to loads, and reactive power planning. Both static planning looking at single time periods and dynamic planning considering multiple time periods simultaneously are used. Transmission planning is interconnected with generation planning, as transmission systems deliver power from generators to loads.
ELECTROSTATICS:Coulomb's law, Electric field & problems
This document provides an overview of the topics covered in the unit on electrostatics, including:
- Coulomb's law, electric fields, Gauss's law and applications.
- Electric potential, conductors and dielectrics in static electric fields.
- Boundary conditions and capacitance of parallel, cylindrical, and spherical capacitors.
- Electrostatic energy and Poisson's and Laplace's equations.
- Current density, Ohm's law, electromotive force, and Kirchhoff's laws.
It then goes on to define Coulomb's law, the electric field intensity, and the principle of superposition. Examples of calculating electric force and field due to point charges are also provided
Load flow study
this ppt is about what is load flow study, importance, need, bus classification, static method and approximate method of load flow study
Load curve
The load curve shows the variation in load on an electrical power station over time. It provides important information such as average daily load, maximum demand, number of generating units needed, and operation scheduling. The demand factor is the ratio of maximum demand to connected load and is used to determine plant equipment capacity. The load factor is the ratio of average load to maximum demand and indicates plant utilization.
POWER SYSTEM OPERATION AND CONTROL. load forecasting - introduction, methodo...
POWER SYSTEM OPERATION AND CONTROL. load forecasting - introduction, methodology & estimation of average and trend terms. PREPARED BY: JOBIN ABRAHAM.
Coulomb's law and its applications
Coulomb's law describes the electrostatic force between two point charges. It states that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. The law leads to the concept of electric field as a vector field that describes the electromagnetic force exerted on charged objects. Electric field lines are a graphical representation of the electric field, with properties like direction, strength, and superposition. Coulomb's law and electric fields can be applied to understand phenomena like dipoles, parallel plates in a capacitor, and spherically symmetric charge distributions.
Initial and final condition for circuit
Initial and final condition for circuit
Explain the transient response of a RC circuit
As the capacitor stores energy when there is:
a transition in a unit step function source, u(t-to)
or a voltage or current source is switched into the circuit.
Explain the transient response of a RL circuit
As the inductor stores energy when there is:
a transition in a unit step function source, u(t-to)
or a voltage or current source is switched into the circuit.
RC Circuit
RL Circuit
Electrostatics
This document provides a summary of Lecture 2 on electrostatics. It introduces fundamental concepts such as electric charge, Coulomb's law, electric field, electric potential, and the relationship between electric field and electric potential. Continuous distributions of charge such as volume, surface, and line charges are also discussed. Key equations for calculating electric fields and potentials from these various charge distributions are presented.
Special Electrical Machines
This document discusses special electrical machines, specifically permanent magnet synchronous motors (PMSM). It describes PMSM as a brushless DC motor with permanent magnets on the rotor that create magnetic poles instead of a field winding. The document outlines the basic construction and working principle of PMSM, noting that a rotating magnetic field from the stator interacts with the permanent rotor magnets to produce torque. Applications mentioned include servo drives, robotics, traction systems, and railway transportation.
Principles of power systems v. k. mehta and r. mehta
This document provides a summary of the Scilab codes included in the Scilab Textbook Companion for the textbook "Principles of Power Systems" by V. K. Mehta And R. Mehta. It includes the book description, a numbering policy for the Scilab codes, and a list of 22 chapters and over 200 Scilab codes included in the companion with brief descriptions of the codes. The codes provide solutions to examples from the textbook to demonstrate power system engineering concepts.
Electrical Power Systems Synchronous Generator
Here are the steps to solve this problem:
a) Given: Generator is 6 pole, 50 Hz
Using the synchronous speed formula: nm = 120f/P
nm = 120*50/6 = 1000 RPM
b) Terminal voltage at different power factors:
1) Given load: Ia = 60 A, PF = 0.8 lagging
Using phasor diagram: Vt = Ea - IaXs
Ea = Vt + IaXs = 480 + 60*1 = 540 V
Vt = 540*cos(cos-1(0.8)) = 480 V
2) PF = 1.0
Vt = Ea = 540 V
3) PF
Single phase induction motor
The single-phase motor, which are designed to operate from a single-phase supply, are manufactured in a large number of types to perform a wide variety of useful services in home, offices, factories, workshops and in a business establishments etc.
Small motors, particularly in the frictional kW sizes are better known than any other. In fact, most of the new products of the manufacturers of space vehicles, aircrafts, business machines and power tools etc. have been possible due to of the advances made in the design of frictional kW motors. Since the performance requirements of the various applications differ so widely, the motor manufacturing industry has developed many different types of such motors, each being designed to meet specific demands.
Single-phase motors may be classified as under, depending on their construction and method of starting:
1. Induction Motors (split-phase, capacitor and shaded-pole etc.)
2. Repulsion Motors (sometime called inductive-series motor)
3. AC Series Motor, and
4. Un-excited Synchronous Motors
SINGLE PHASE INDUCTION MOTORS AND SPECIAL MACHINES
Constructional details – Double revolving field theory – Equivalent circuit – Starting methods – Role of induction motor in industries and household appliances – Reluctance motor - Servo motor - Stepper motor - Universal motor - Switched reluctance motor - Linear induction motor – Linear Synchronous motor.
re-derivation of maxwell's equations regarding electromagnetism
The document discusses Maxwell's equations and their applications. It begins by listing Maxwell's equations and the constitutive relations. It then provides several examples of using Maxwell's equations, including deriving the diffusion equation from Maxwell's equations, solving the diffusion equation for magnetic flux density near a vacuum-copper interface, deriving the continuity equation from Maxwell's equations, and explaining Poynting's theorem. The document also discusses representing Maxwell's equations in integral and phasor forms and provides examples of calculating power, frequency, and Poynting vectors using these representations.
state space representation,State Space Model Controllability and Observabilit...
State Variables of a Dynamical System
State Variable Equation
Why State space approach
Block Diagram Representation Of State Space Model
Controllability and Observability
Derive Transfer Function from State Space Equation
Time Response and State Transition Matrix
Eigen Value
Power System Stability Introduction
Objectives: This course will provide a comprehensive overview of power system stability and control problems. This includes the basic concepts, physical aspects of the phenomena, methods of analysis, the integration of MATLAB and SINULINK in the analysis of power system .
Course Content: 1. Power System Stability: Introduction
2. Stability Analysis: Swing Equation
3. Models for Stability Studies
4. Steady State Stability
5. Transient Stability
6. Multimachine Transient Stability
7. Power System Control: Introduction
8. Load Frequency Control
9. Automatic generation Control
10. Reactive Power Control
Principles of Power Systems V.K Mehta Complete Book - Chapter 2
In this modern world, the dependence on
electricity is so much that it has become a
part and parcel of our life. The ever increas-
ing use of electric power for domestic, commer-
cial and industrial purposes necessitates to pro-
vide bulk electric power economically. This is
achieved with the help of suitable power produc-
ing units, known as Power plants or Electric
power generating stations. The design of a power
plant should incorporate two important aspects.
Firstly, the selection and placing of necessary
power-generating equipment should be such so
that a maximum of return will result from a mini-
mum of expenditure over the working life of the
plant. Secondly, the operation of the plant should
be such so as to provide cheap, reliable and
continuous service. In this chapter, we shall
focus our attention on various types of generat-
ing stations with special reference to their advan-
tages and disadvantages.
SYNCHRONOUS MACHINES
Physical Description
Mathematical Model
Park's "dqo" transportation
Steady-state Analysis
phasor representation in d-q coordinates
link with network equations
Definition of "rotor angle"
Representation of Synchronous Machines in Stability Studies
neglect of stator transients
magnetic saturation
Simplified Models
Synchronous Machine Parameters
Reactive Capability Limits
Consists of two sets of windings:
3 phase armature winding on the stator distributed with centres 120° apart in space
field winding on the rotor supplied by DC
Two basic rotor structures used:
salient or projecting pole structure for hydraulic units (low speed)
round rotor structure for thermal units (high speed)
Salient poles have concentrated field windings; usually also carry damper windings on the pole face. Round rotors have solid steel rotors with distributed windings
Nearly sinusoidal space distribution of flux wave shape obtained by:
distributing stator windings and field windings in many slots (round rotor);
shaping pole faces (salient pole)
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POWER SYSTEM OPERATION AND CONTROL. load forecasting - introduction, methodo...
Principles of power systems v. k. mehta and r. mehta
Principles of power systems v. k. mehta and r. mehta
SINGLE PHASE INDUCTION MOTORS AND SPECIAL MACHINES
SINGLE PHASE INDUCTION MOTORS AND SPECIAL MACHINES
re-derivation of maxwell's equations regarding electromagnetism
re-derivation of maxwell's equations regarding electromagnetism
state space representation,State Space Model Controllability and Observabilit...
state space representation,State Space Model Controllability and Observabilit...
Principles of Power Systems V.K Mehta Complete Book - Chapter 2
Principles of Power Systems V.K Mehta Complete Book - Chapter 2
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This document contains an admission ticket for a candidate named Darsana Sasi S for an examination to be held on November 9th, 2013. The 3-sentence summary is:
The admission ticket provides details of the examination such as the date, time, location, and syllabus which will include topics on simple arithmetic, mental ability, general knowledge, current affairs, general English, and the regional language of Malayalam, Tamil, or Kannada. Instructions are given for candidates to bring the admission ticket and valid photo identification, as well as directions for filling out identification forms and answer sheets. Candidates who do not follow the instructions may be denied entry or have their answer sheets invalidated.
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This document provides instructions for a 100 question, 300 point exam that will take place from 11:00 am to 1:00 pm. The exam covers four subjects: Functional English, Mathematical Aptitude, Reasoning, and Computing Awareness. Examinees must fill out an Optical Mark Reader (OMR) answer sheet using a black or blue ballpoint pen. Electronic devices are prohibited. Each correct answer is worth 3 points, while unanswered questions receive 0 points and multiple answers to a question are considered incorrect. Examinees must sign and fill out identifying information on the OMR sheet correctly and return all exam materials before leaving.
STAT 200 Final ExaminationFall 2016 OL1US1Page 9 of 9STAT 200.docx
STAT 200 Final ExaminationFall 2016 OL1/US1Page 9 of 9
STAT 200 Introduction to Statistics Name______________________________
Final Examination: Fall 2016 OL1/US1 Instructor __________________________
Answer Sheet
Instructions:
This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator.
Record your answers and work in this document.
Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from calculators, programs or software packages without explanation will not be accepted. If you need to use technology to aid in your calculation, you have to cite the source and explain how you get the results. For example, state the Excel function along with the required parameters when using Excel; describe the detailed steps when using a hand-held calculator; or provide the URL and detailed steps when using an online calculator, and so on.
Show all supporting work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand-write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages.
You must complete the exam individually. Neither collaboration nor consultation with others is allowed. It is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use unauthorized materials or work from others. Your exam will receive a zero grade unless you complete the following honor statement.
Please sign (or type) your name below the following honor statement:
I understand that it is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use unauthorized materials or work from others. I promise that I did not discuss any aspect of this exam with anyone other than my instructor. I further promise that I neither gave nor received any unauthorized assistance on this exam, and that the work presented herein is entirely my own.
Name _____________________Date___________________
Record your answers and work.
Problem Number
Solution
1
Answer:
(a)
(b)
(c)
(d)
(e)
Justification:
2
Answer:
(a)
(b)
(c)
Justification:
3
Answer:
(a)
(b)
Justification:
4
Answer:
(a)
IQ Scores
Frequency
Relative Frequency
50 - 69
23
70 - 89
249
90 -109
0.450
110 - 129
130 - 149
25
Total
1000
(b)
(c)
Work for (a) and (b):
5
Answer:
(a)
(b)
(c)
Justification:
6
Answer:
(a)
(b)
Work for (a) and (b):
7
Answer:
(a)
(b)
Work for (b):
8
Answer:
(.
Jeemain 2015 question-paper_solution
This document provides instructions for a physics, chemistry and mathematics exam. It states that the exam is 3 hours long and consists of 90 questions worth a total of 360 marks. The questions are divided evenly into three sections on physics, chemistry and mathematics. Each correct answer receives 4 marks, while an incorrect answer loses 1/4 marks. Only one answer per question is correct. Rough work space is provided at the end of the test booklet. Candidates must fill out personal details on the answer sheet and test booklet and submit the answer sheet after completing the exam.
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Orientation-PPT-NEET(UG)-2020.pptx
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2) NEET (UG) - 2020 will be conducted on September 13, 2020 across 155 cities with approximately 3842 examination centers.
3) Several measures will be implemented for test administration due to the COVID-19 pandemic, including fewer candidates per room, thermal screening, social distancing, and provision of masks and sanitizers.
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This document provides instructions for a test being administered. It notes that the test is 3 hours long and consists of 90 questions worth a total of 360 marks. The questions are divided evenly into three sections on physics, chemistry, and mathematics. Candidates will be awarded 4 marks for each correct response and deducted 1/4 marks for incorrect responses. Candidates are instructed to fill in personal details on the test booklet and answer sheet and are not allowed to use any unauthorized materials during the test.
01 a
This document provides the general instructions for the GATE 2014 examination. It discusses the following key points in 3 sentences:
The GATE 2014 exam will last 180 minutes total. It consists of two sections - General Aptitude (15 marks) and a subject-specific paper (85 marks). Candidates can attempt a total of 65 questions worth 100 marks, which can be multiple choice or numerical answer type, and there is negative marking for incorrect multiple choice answers.
Jeemain 2015 question-paper_solution
This document provides instructions for a physics, chemistry and mathematics exam. It details important information like exam duration (3 hours), number of questions (90), maximum marks (360), and question distribution among the three subjects. It also specifies rules regarding marking, response filling, use of calculators/devices, rough work space, and handing over of answer sheets. Candidates are advised to carefully read and follow these instructions for the exam.
Beacon Classes
BEACON classes is a coaching institute located in Noida, India that provides tutoring for engineering entrance exams like JEE Mains, JEE Advanced, and medical entrance exams. It aims to provide high-quality and affordable coaching to help students succeed on exams like JEE, NEET, NTSE, and Olympiads. JEE is India's national level engineering entrance exam conducted in two parts, with performance in Main determining eligibility for Advanced, and performance in Advanced used for admissions to top engineering schools like IITs.
STAT 200 Final Examination Fall 2014 OL4 US2 Page 1 of 12 .docx
STAT 200 Final Examination Fall 2014 OL4 / US2 Page 1 of 12
Stat 200 Introduction to Statistics Name______________________________
Final Examination: Fall 2014 OL4 / US2 Instructor __________________________
Answer Sheet
Instructions:
This is an open-book exam. You may refer to your text and other course materials as you work
on the exam, and you may use a calculator.
Record your answers and work in this document.
Answer all 30 questions. Make sure your answers are as complete as possible. Show all of
your work and reasoning. In particular, when there are calculations involved, you must
show how you come up with your answers with critical work and/or necessary tables.
Answers that come straight from programs or software packages will not be accepted.
When requested, show all work and write all answers in the spaces allotted on the following
pages. You may type your work using plain-text formatting or an equation editor, or you may
hand-write your work and scan it. In either case, show work neatly and correctly, following
standard mathematical conventions. Each step should follow clearly and completely from the
previous step. If necessary, you may attach extra pages.
You must complete the exam individually. Neither collaboration nor consultation with
others is allowed. Your exam will receive a zero grade unless you complete the following
honor statement.
Please sign (or type) your name below the following honor statement:
I promise that I did not discuss any aspect of this exam with anyone other than my instructor. I
further promise that I neither gave nor received any unauthorized assistance on this exam, and
that the work presented herein is entirely my own.
Name _____________________ Date___________________
STAT 200 Final Examination Fall 2014 OL4 / US2 Page 2 of 12
Record your answers and work.
Problem
Number
Solution
1
(25 pts)
Answers:
(a)
(b)
(c)
(d)
(e)
Work for (a), (b), (c), (d) and (e):
2
(5 pts)
Answer:
Work:
STAT 200 Final Examination Fall 2014 OL4 / US2 Page 3 of 12
3
(5 pts)
Answer:
Work:
4
(5 pts)
Answer:
Work:
5
(10 pts)
Answer:
Work:
STAT 200 Final Examination Fall 2014 OL4 / US2 Page 4 of 12
6
(10 pts)
Answer:
Work:
7
(5 pts)
Answer:
Work:
8
(5 pts)
Answer:
Work:
STAT 200 Final Examination Fall 2014 OL4 / US2 Page 5 of 12
9
(10 pts)
Answer:
Work:
10
(10 pts)
Answer:
Work:
11
(5 pts)
Answer:
Work:
12
(10 pts)
Answer:
Work:
STAT 200 Final Examination Fall 2014 OL4 / US2 Page 6 of 12
13
(10 pts)
Answer:
Work:
14
(5 pts)
Answer:
Work:
15
(5 pts)
Answer:
Work:
16
(5 pts)
Answer:
Work:
STAT 200 Final Examination Fall 2014 OL4 / US2 Page 7 of 12.
Jee main-2014-question-paper-and-solution
The document provides instructions for a JEE-MAIN exam. It details that the exam is 3 hours, consists of 90 questions worth a total of 360 marks, and covers physics, math, and chemistry. It instructs students to fill in personal details on the answer sheet and test booklet, choose only one answer per question, and do any calculations in the spaces provided. Students may not use phones or other devices during the exam and must turn in their answer sheet after completing the test.
Cs02 2014
The document provides general instructions for the GATE 2014 examination. It states that the exam duration is 180 minutes, the timer will countdown the remaining time, and the exam will automatically end when time expires. It describes that useful data can be viewed by clicking a button, a scribble pad is provided for rough work, and a non-programmable calculator is allowed but not sharing. It outlines the process for navigating questions, answering multiple choice and numerical questions, saving answers, and reviewing questions. It also describes how to choose and change optional exam sections.
Cs02 2014
The document provides instructions for the GATE 2014 computer science examination. It states that the exam duration is 180 minutes and consists of two sections worth a total of 100 marks: General Aptitude (15 marks) and the computer science paper (85 marks). It provides details on the types of questions, marking schemes, and navigation during the exam. Candidates are informed that calculators are allowed but sharing is not, and rough work should be done on the provided scribble pad.
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STAT 200 Final ExaminationFall 2016 OL1US1Page 9 of 9STAT 200.docx
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STAT 200 Final Examination Fall 2014 OL4 US2 Page 1 of 12 .docx
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NSEJS Previous Year Papers 2008-2009
- 1. INDIAN ASSOCIATION OF PHYSICS TEACHERS NATIONAL STANDARD EXAMINATION IN JUNIOR SCIENCE 2008 - 2009 Date of examination: 23rd November 2008 Time 16.15 to 17.15 Hrs. Instructions to Candidates www.AmansMathsBlogs.com 1. In addition to this question paper, you are given a separate answer sheet. 2. On the answer sheet fill up all the entries carefully in the space provided, ONLY IN BLOCK CAPITALS. Incomplete / incorrect / carelessly filled information may disqualify your candidature. 3. On the answer sheet, use only BLUE or BLACK BALL PEN for making entries and marking answers. 4. This paper has two part. In part A1 (Q. Nos. 1 to 30) each question has FOUR alternatives, out of which only one is correct. Choose the correct alternative and mark a cross (X) in the corresponding box on the answer sheet. Q.No. a b c d For example, 22 Part A2 (Q. Nos. 31 to 40) has four alternatives in each question, but any number of these (4, 3, 2, or 1) may be correct. You have to mark ALL correct alternatives and mark a cross (X) for each, like Q.No. a b c d 42 5. Any rough work should be done only on the sheet provided at the end of question paper. 6. For Part A1, each correct answer gets 3 marks; wrong answer gets a penaltyof 1 mark. For Part A2 full marks are 6 for each question, you get them when ALL correct answers only are marked. 7. Use of nonprogrammable calculator is allowed. 8. No candidate should leave the examination hall before the completion of the examination. 9. The answers / solutions of this question paper will be available on our website - www.iapt.org.in by 30 th November 2008. 10. Result sheets and the "centre top 10%" certificates of NSEA are dispatched to the Professor in charge of the centre. Thus you will get your marks from the Professor in charge of your centre by January 2009 end. 11. TOP 300 (or so) students are called for the next examination-Indian National Astronomy Olympiads (INAO). Individual letters are sent to these students ONLY. 12. No querries will be entertained in this regard. PLEASE DO NOT MAKE ANY MARK OTHER THAN (X) IN THE SPACE PROVIDED ON THE ANSWER SHEET. Answer sheets are evaluated with the help of a machine. Due to this, CHANGE OF ENTRY IS NOT ALLOWED. Scratching or overwriting may result in wrong score. DO NOT WRITE ANYTHING ON BACK SIDE OF ANSWER SHEET. CERTIFICATES & AWARDS Following certificates are awarded by the I.A.P.T. to students successful in NSEA. i) Certificate for "Centre Top 10%" students. ii) Merit certificates to statewise Top 1% students. iii) Merit certificate and a prize in the form of a book to Nationwise Top 1% students.