Electromagnetism describes the interactions between electric and magnetic fields. Michael Faraday and James Clerk Maxwell first established that changing magnetic fields produce electric currents and changing electric fields produce magnetic fields. Maxwell showed that oscillating electric and magnetic fields propagate as electromagnetic waves, including radio waves, visible light, and others. All electromagnetic waves travel at the speed of light and have characteristics determined by their frequency or wavelength.
An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. ... An electromagnet works because an electric current produces a magnetic field. Electromagnetism is produced when an electrical current flows through a simple conductor such as a length of wire or cable, and as current passes along the whole of the conductor then a magnetic field is created along the whole of the conductor.
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.
An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. ... An electromagnet works because an electric current produces a magnetic field. Electromagnetism is produced when an electrical current flows through a simple conductor such as a length of wire or cable, and as current passes along the whole of the conductor then a magnetic field is created along the whole of the conductor.
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.
FellowBuddy.com is an innovative platform that brings students together to share notes, exam papers, study guides, project reports and presentation for upcoming exams.
We connect Students who have an understanding of course material with Students who need help.
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# Students can catch up on notes they missed because of an absence.
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Our Vision & Mission – Simplifying Students Life
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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.
Derive the thermal-equilibrium concentrations of electrons and holes in a semiconductor as a function of the Fermi energy level.
Discuss the process by which the properties of a semiconductor material can be favorably altered by adding specific impurity atoms to the semiconductor.
Determine the thermal-equilibrium concentrations of electrons and holes in a semiconductor as a function of the concentration of dopant atoms added to the semiconductor.
Determine the position of the Fermi energy level as a function of the concentrations of dopant atoms added to the semiconductor.
basic principles of electrical machines,faraday's laws of electro magnetic induction principle.dynamically induced Emf statically induced emf applications to electrical machines
This is first PPT in the electrostatics series. This PPT presents idea of charge , its various methods of production like through conduction, friction, induction. It also describes working of electroscope & concept of grounding of an insulator.
explain the k-space diagrams of si and GaAs and the difference between the direct and the indirect bands, Additional Effective Mass Concepts, Mathematical Derivation for the density of state function with extension ti to semiconductors
Maxwell's equation and it's correction in Ampere's circuital lawKamran Ansari
In this presentation, you will get the detailed information about the problem with Ampere's circuital law and how Maxwell corrected Ampere's circuital law in the case of changing electric field or electric flux and also about Maxwell's equation of electrodynamics.
FellowBuddy.com is an innovative platform that brings students together to share notes, exam papers, study guides, project reports and presentation for upcoming exams.
We connect Students who have an understanding of course material with Students who need help.
Benefits:-
# Students can catch up on notes they missed because of an absence.
# Underachievers can find peer developed notes that break down lecture and study material in a way that they can understand
# Students can earn better grades, save time and study effectively
Our Vision & Mission – Simplifying Students Life
Our Belief – “The great breakthrough in your life comes when you realize it, that you can learn anything you need to learn; to accomplish any goal that you have set for yourself. This means there are no limits on what you can be, have or do.”
Like Us - https://www.facebook.com/FellowBuddycom
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.
Derive the thermal-equilibrium concentrations of electrons and holes in a semiconductor as a function of the Fermi energy level.
Discuss the process by which the properties of a semiconductor material can be favorably altered by adding specific impurity atoms to the semiconductor.
Determine the thermal-equilibrium concentrations of electrons and holes in a semiconductor as a function of the concentration of dopant atoms added to the semiconductor.
Determine the position of the Fermi energy level as a function of the concentrations of dopant atoms added to the semiconductor.
basic principles of electrical machines,faraday's laws of electro magnetic induction principle.dynamically induced Emf statically induced emf applications to electrical machines
This is first PPT in the electrostatics series. This PPT presents idea of charge , its various methods of production like through conduction, friction, induction. It also describes working of electroscope & concept of grounding of an insulator.
explain the k-space diagrams of si and GaAs and the difference between the direct and the indirect bands, Additional Effective Mass Concepts, Mathematical Derivation for the density of state function with extension ti to semiconductors
Maxwell's equation and it's correction in Ampere's circuital lawKamran Ansari
In this presentation, you will get the detailed information about the problem with Ampere's circuital law and how Maxwell corrected Ampere's circuital law in the case of changing electric field or electric flux and also about Maxwell's equation of electrodynamics.
Electricity and magnetism are different facets of electromagnetism
a moving electric charge produces magnetic fields
changing magnetic fields move electric charges
This connection first elucidated by Faraday, Maxwell
Einstein saw electricity and magnetism as frame-dependent facets of unified electromagnetic force
Sun tracking schemes for photovoltaic panelsavocado1111
Presented at 3rd International Conference on the Developments in Renewable Energy Technology, ICDRET 2014, on January 9-11, 2014 at Dhaka, Bangladesh
http://icdret.uiu.ac.bd/
Award: Prof. H. Rashid Best Paper Presentation Award (2nd Position)
Presented by: Samiul Alam
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Overview on Edible Vaccine: Pros & Cons with Mechanism
Lecture 1 electromagnetism
1. James Clerk Maxwell Michael Faraday
Electromagnetism
Electromagnetic Induction
Electromagnetic Waves
2. 2
Electromagnetism
• Electricity and magnetism are different facets of
electromagnetism
– a moving electric charge produces magnetic fields
– changing magnetic fields move electric charges
• This connection first elucidated by Faraday,
Maxwell
• Einstein saw electricity and magnetism as
frame-dependent facets of unified
electromagnetic force
3. 3
Magnetic fields from electricity
• A static distribution of charges produces an
electric field
• Charges in motion (an electrical current)
produce a magnetic field
– electric current is an example of charges (electrons)
in motion
4. 4
Electromagnets
• Arranging wire in a coil and running a
current through produces a magnetic field
that looks a lot like a bar magnet
– called an electromagnet
– putting a real magnet inside, can shove the
magnet back and forth depending on current
direction: called a solenoid
5. Induced Current
• The next part of the story is that a changing magnetic field produces
an electric current in a loop surrounding the field
– called electromagnetic induction, or Faraday’s Law
Spring 2008 5
6. 6
The Electromagnetic Connection
• A changing magnetic field produces an electric field, and a
changing electric field produces a magnetic field.
• Electric and Magnetic fields can produce forces on charges
• An accelerating charge produces electromagnetic waves
(radiation)
• Both electric and magnetic fields can transport energy
– Electric field energy used in electrical circuits, e.g., released in
lightning
– Magnetic field carries energy through transformer, for example
7. 7
Electromagnetic Radiation
• Interrelated electric and magnetic fields traveling through space
• All electromagnetic radiation travels at c = 3108 m/s in
vacuum – the cosmic speed limit!
– real number is 299792458.0 m/s exactly
8. 8
What’s “Waving” in EM waves?
• What medium transports sound waves?
– Can there be sound waves in the vacuum of outer space?
• What medium transports water waves?
• What medium transports radio waves?
• A topic of considerable debate in the late 1800’s and early
1900’s
• Led to the concept of the “luminiferous ether” – an invisible
“jello” that was thought to vibrate electromagnetically
• Experiments that sought this ether didn’t find it!
• This was quite a surprise
Electromagnetic waves travel through empty space!
9. Examples of Electromagnetic Radiation
9
• AM and FM radio waves (including TV signals)
• Cell phone communication links
• Microwaves
• Infrared radiation
• Light
• X-rays
• Gamma rays
• What distinguishes these from one another?
10. 10
Uses of Electromagnetic Waves
• Communication systems
– One-way and two-way
• Radar
• Cooking (with microwaves)
• Medical Imaging (X rays)
• “Night Vision” (infrared)
• Astronomy (radio, wave, IR, visible, UV, gamma)
All that we experience through our eyes is conveyed by
electromagnetic radiation…
11. 11
The Electromagnetic Spectrum
• Relationship between frequency, speed and
wavelength
f ·l = c
f is frequency, l is wavelength, c is speed of
light
• Different frequencies of electromagnetic
radiation are better suited to different
purposes
• The frequency of a radio wave determines its
propagation characteristics through various
media
12. US Frequency Allocation – the FCC
12
“Radio” frequency-space is allocated to the hilt!
Here’s a sample region from 300–600 MHz
(300 MHz has a wavelength of 1 meter)
International allocation gets tricky
13. 13
Generation of Radio Waves
• Accelerating charges radiate EM energy
• If charges oscillate back and forth, get time-varying
fields
E
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14. 14
Generation of Radio Waves
If charges oscillate back and forth, get time-varying magnetic fields too
Note that the magnetic fields are perpendicular to the electric field
vectors
B
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16. 16
Reception of Radio Waves
Receiving antenna works best when
‘tuned’ to the wavelength of the signal,
and has proper polarization
E
Electrons in antenna are “jiggled”
by passage of electromagnetic wave
Optimal antenna length is one quarter-wavelength (l/4)
