1. Maxwell's equations predict that electromagnetic energy propagates away from time-varying sources in the form of waves.
2. The document derives the electromagnetic wave equation and describes its solution for uniform plane waves in various media.
3. Key wave properties like velocity, wavelength, frequency and attenuation are determined by examining solutions to the wave equations for the electric and magnetic fields.
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Alternating current (AC), is an electric current in which the flow of electric charge periodically reverses direction, whereas in direct current (DC, also dc), the flow of electric charge is only in one direction.
Maxwells equation and Electromagnetic WavesA K Mishra
These slide contains Scalar,Vector fields ,gradients,Divergence,and Curl,Gauss divergence theorem,Stoks theorem,Maxwell electromagnetic equations ,Pointing theorem,Depth of penetration (Skin depth) for graduate and Engineering students and teachers.
COMSATS Institute of Information and Technology, Sahiwal
Department of Electrical Engineering
Prepared By: Umaiz Ahmad and Yasir Zulfiqar
CONTACT:
+92-321-7899091
+92-336-0006247
FellowBuddy.com is an innovative platform that brings students together to share notes, exam papers, study guides, project reports and presentation for upcoming exams.
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Alternating current (AC), is an electric current in which the flow of electric charge periodically reverses direction, whereas in direct current (DC, also dc), the flow of electric charge is only in one direction.
Maxwells equation and Electromagnetic WavesA K Mishra
These slide contains Scalar,Vector fields ,gradients,Divergence,and Curl,Gauss divergence theorem,Stoks theorem,Maxwell electromagnetic equations ,Pointing theorem,Depth of penetration (Skin depth) for graduate and Engineering students and teachers.
COMSATS Institute of Information and Technology, Sahiwal
Department of Electrical Engineering
Prepared By: Umaiz Ahmad and Yasir Zulfiqar
CONTACT:
+92-321-7899091
+92-336-0006247
explains about Poyntings theorem, boundary conditions, poissons and laplace equations and uniqueness theorem and its importance in Electromagnetic theory
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It covers all the Maxwell's Equation for Point form(differential form) and integral form. It also covers Gauss Law for Electric Field, Gauss law for magnetic field, Faraday's Law and Ampere Maxwell law. It also covers the reason why Gauss Laws are also known as Maxwell's Equation.
This presentation is about electromagnetic fields, history of this theory and personalities contributing to this theory. Applications of electromagnetism. Vector Analysis and coordinate systems.
explains about Poyntings theorem, boundary conditions, poissons and laplace equations and uniqueness theorem and its importance in Electromagnetic theory
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It covers all the Maxwell's Equation for Point form(differential form) and integral form. It also covers Gauss Law for Electric Field, Gauss law for magnetic field, Faraday's Law and Ampere Maxwell law. It also covers the reason why Gauss Laws are also known as Maxwell's Equation.
This presentation is about electromagnetic fields, history of this theory and personalities contributing to this theory. Applications of electromagnetism. Vector Analysis and coordinate systems.
В этой книге собраны лучшие письма детей, участников конкурса «Лучший урок письма», в номинациях: «Кем я хочу стать, чтобы сделать мир лучше», «Мир, в котором я хотел бы вырасти», «Истории случаются с теми, кто умеет о них рассказывать».
Discover the beneficial effect of pulsed magnetic fields to help improve you health and well being. PEMF are natural and non medicated and contribute to reduce pain and swelling
michel.gareau@centurionsystems.com
www.pemfcenturion.com
International Presentation Forum Present!Vera Kovaleva
International Presentation Forum Present! takes place in Moscow several times per year. During two days you can learn and practice all aspects of presentations: presentation structure, visual communication and info graphics, delivery and communication skills. You can get more information here: www.presportal.ru/present/.
Electromagnetic waves are an essential aspect of the study of physics, particularly in the realm of electromagnetism. These waves are characterized by their ability to propagate through space without the need for a medium, unlike mechanical waves such as sound waves. At the heart of electromagnetic theory lies the groundbreaking work of James Clerk Maxwell, who formulated a set of equations that unified the phenomena of electricity and magnetism.
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24 pius augustine em induction & acPiusAugustine
Faraday's law, motional emf, transformer, ac generator
Target: Grade X and above.
Physics for all: with target group IIT JEE, AIEEE, and other state-level entrance exams, CSIR-UGC NET, GATE, JEST etc, and for interviews
MITIGATION OF UNBALANCED FAULTS IN DISTRIBUTION SYSTEM USING FD-STATCOM WITH ...Suganthi Thangaraj
Power quality is certainly a major concern in the present era. This paper proposes a flexible D-STATCOM with a new controller scheme. And it supplies power to sensitive loads under Islanding conditions. This paper introduces the performance of FD-STATCOM system to mitigate power quality problems under all types of system related disturbances such as L-L &DLG faults. A 12 pulse IGBT based D-STATCOM is designed using MATLAB. Here the super capacitor is used as the storage device. The realibility of the control scheme in the system response to the voltage disturbances caused by LL&DLG faults and Islanded operating conditions are obviously proved in the simulation results.
IMPROVED SWARM INTELLIGENCE APPROACH TO MULTI OBJECTIVE ED PROBLEMSSuganthi Thangaraj
Electrical power industry restructuring has created highly vibrant and competitive market that altered many aspects of the power industry. In this changed scenario, scarcity of energy resources, increasing power generation cost, environment concern, ever growing demand for electrical energy necessitate optimal economic dispatch. Practical economic dispatch (ED) problems have nonlinear, non-convex type objective function with intense equality and inequality constraints. The conventional optimization methods are not able to solve such problems as due to local optimum solution convergence. Metaheuristic optimization techniques especially Improved Particle Swarm Optimization (IPSO) has gained an incredible recognition as the solution algorithm for such type of ED problems in last decade. The application of IPSO in ED problem, which is considered as one of the most complex optimization problem has been summarized in present paper. This paper illustrates successful implementation of the Improved Particle Swarm Optimization (IPSO) to Economic Load Dispatch Problem (ELD). Power output of each generating unit and optimum fuel cost obtained using IPSO algorithm has been compared with conventional techniques. The results obtained shows that IPSO algorithm converges to optimal fuel cost with reduced computational time when compared to PSO and GA for the three, six and IEEE 30 bus system.
A Hybrid Control Scheme for Fault Ride-Through Capability using Line-Side Con...Suganthi Thangaraj
As the wind power installations are increasing in number, Wind Turbine Generators (WTG) are required to have Fault Ride-Through (FRT) capabilities. Lately developed grid operating codes demand the WTGs to stay connected during fault conditions, supporting the grid to recover faster back to its normal state. In this paper, the generator side converter incorporates the maximum power point tracking algorithm to extract maximum energy from wind turbine system. A hybrid control scheme for energy storage systems (ESS) and braking choppers for fault ride-through capability and a suppression of the output power fluctuation is proposed for permanent-magnet synchronous generator (PMSG) wind turbine systems. During grid faults, the dc-link voltage is controlled by the ESS instead of the line-side converter (LSC), whereas the LSC is exploited as a STATCOM to inject reactive current into the grid for assisting in the grid voltage recovery. A simple model of the proposed system is developed and simulated in MATLAB environment. The effectiveness of the system is validated through extensive simulation results
ENHANCING RELIABILITY BY RECONFIGURATION OF POWER DISTRIBUTION SYSTEMS CONSID...Suganthi Thangaraj
The paper describes an effective method to reconfigure a power distribution system using optimization techniques. Here genetic algorithm is used for the reconfiguration to enhance reliability and to reduce losses. The reliability at the load points is evaluated using probabilistic reliability approach. For finding minimal cut sets and losses different algorithms are used. To maximise the reliability and to reduce the losses, the status of the switch is controlled using genetic algorithm. The effectiveness of the system is tested in 33 bus distribution system.
An Improved Differential Evolution Algorithm for Congestion Management Consid...Suganthi Thangaraj
In deregulated electricity market, Congestion Management (CM) is one of the most significant issues in order to maintain
the system in secure state and to get the reliable system operation. While addressing Congestion Management voltage
stability should also be taken into account. This paper elucidates an Improved Differential Evolution (IDE) algorithm to
alleviate Congestion in transmission line by rescheduling of generators while considering voltage stability. Differential
Evolution (DE) is one of the heuristic, population based algorithm which is well suited for solving complex and non-linear
optimization problems. A Double Best Mutation Operator (DBMO) is proposed to improve DE algorithm’s convergence
rate. In order to validate suitability of the suggested approach, it has been evaluated on the IEEE-30 bus test system on
both base case loading as well as 10% increased load. The test system has been also examined under critical line outages.
The results and discussions clearly depicts the effectiveness of the projected approach in solving Congestion Management
Problem.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
2. Electro Magnetic Wave Equation
• Maxwell’s equations predict the propagation of electromagnetic energy
away from time-varying sources in the form of waves.
• Consider a linear, homogeneous, isotropic media characterized by
(µ,ε,σ)
• Maxwell’s equations written in terms of E and H
---1
---2
---3
---4
3. Taking Curl on both sides of the equation 1
And inserting 2 gives
And Curl on both sides of equation 2
And inserting 1 gives
---5
5. • For time-harmonic fields, the instantaneous (time-domain) vector
F is related to the phasor (frequency-domain) vector Fs by
Using these relationships, the instantaneous vector wave equations
are transformed into the phasor vector wave equations
If we let
the phasor vector wave equations reduce to
6. The complex constant γ is defined as the propagation constant
The real part of the propagation constant (α) is defined as the
attenuation
constant while the imaginary part (β) is defined as the phase constant.
Given the properties of the medium (µ,ε,σ), we may determine
equations for the attenuation and phase constants.
7.
8. Properties of Electromagnetic Waves
• The properties of an electromagnetic wave (direction of propagation, velocity of
propagation, wavelength, frequency, attenuation, etc.) can be determined by
examining the solutions to the wave equations that define the electric and
magnetic fields of the wave. In a source-free region, the phasor vector wave
equations are
The operator in the above equations ( ) is the vector Laplacian
operator.
9. The phasor wave equations can then be written as
Individual wave equations for the phasor field components [(Exs, Eys, Ezs) and
(Hxs, Hys, Hzs)] can be obtained by equating the vector components on both
sides of each phasor wave equation.
10. Plane Wave
(1.) E and H lie in a plane z to the direction of propagation.
(2.) E and H are z to each other.
Uniform Plane Wave
In addition to (1.) and (2.) above, E and H are uniform in the plane z to the
direction of propagation (E and H vary only in the direction of propagation).
Example (Uniform time-harmonic plane wave)
11. • The uniform plane wave for this example has only a z-component of
electric field and an x-component of magnetic field which are both
functions of only y.
• An electromagnetic wave which has no electric or magnetic field
components in the direction of propagation (all components of E and H
are perpendicular to the direction of propagation) is called a transverse
electromagnetic (TEM) wave.
• All plane waves are TEM waves.
•The polarization of a plane wave is defined as the direction of the
electric field (this example is a z-polarized plane wave).
•For this uniform plane wave, the component wave equations for the only
two field components (Ezs, Hxs) can be simplified significantly given the
field dependence on y only.
12. The remaining single partial derivative in each component wave equation
becomes a pure derivative since Ezs and Hxs are functions of y only.
13. Solution of wave equation
where (E1, E2) are constants (electric field amplitudes) and (H1, H2) are
constants (magnetic field amplitudes).
Note that Ezs and Hxs satisfy the same differential equation. Thus, other
than the field amplitudes, the wave characteristics of the fields are
identical.
15. The velocity at which this point of constant phase moves is the velocity
of propagation for the wave. Solving for the position variable y in the
equations defining the point of constant phase gives
16. •Given the y-coordinate of the constant phase point as a function of
time, the vector velocity u at which the constant phase point moves is
found by differentiating the position function with respect to time.
•Given a wave traveling at a velocity u, the wave travels one
wavelength (λ) during one period (T ).
17. •For a uniform plane wave propagating in a given medium, the ratio of electric
field to magnetic field is a constant. The units on this ratio has units of ohms
and is defined as the intrinisic wave impedance for the medium.
•Assuming a +ay traveling uniform plane wave defined by an electric field of
the corresponding magnetic field is found from the source free Maxwell’s
equations.
18. •The intrinsic impedance of the wave is defined as the ratio of the electric
field and magnetic field phasors (complex amplitudes).
•In general, the intrinsic wave impedance is complex. The magnitude of the
complex intrinsic wave impedance is
21. •The figure below shows the relationship between E and H for the previously
assumed uniform plane wave propagating in a lossless medium.
•The lossless medium propagation constant is purely imaginary (γ=jβ)while
the intrinsic wave impedance is purely real.
22. •The propagation constant and the intrinsic wave impedance of a lossy
medium are complex, which yields the following electric field and
magnetic fields
•The electric and magnetic fields in a lossy medium are out of phase an
amount equal to the phase angle of the intrinsic impedance.
23. Wave Propagation in Free Space
•Air is typically very low loss (negligible attenuation) with little polarization
or magnetization.
•Thus, we may model air as free space (vacuum) with σ=0, ε= εoand μ= μo
(εr=1, μ r=1). We may specialize the lossless medium equations for the
case of free space.
24. Wave Propagation in Good Conductors (σ>>ωε)
•In a good conductor, displacement current is negligible in comparison
to conduction current.
•Although this inequality is frequency dependent, most good conductors
(such as copper and aluminum) have conductivities on the order of 107
mho/m and negligible polarization such that we never encounter the
frequencies at which the displacement current becomes comparable to the
displacement current.
•Given σ>>ωε the propagation constant within a good conductor may be
approximated by
25. •Note that attenuation in a good conductor increases with frequency.
•The rate of attenuation in a good conductor can be characterized by a
distance defined as the skin depth.
26. Skin depth (δ)
•Distance over which a plane wave is attenuated by a factor of e-1 in a
good conductor
27. •The velocity of propagation, wavelength and intrinsic impedance within
the good conductor is