Maglev, short for magnetic levitation, is a technology that uses magnetic forces to lift and propel vehicles, most commonly trains, above a track. This system eliminates friction between the train and the track, allowing for much higher speeds and smoother rides compared to traditional rail systems.
Lorentz-violating electrodynamics refers to modifications of the standard theory of electromagnetism that permit violations of Lorentz invariance, a fundamental symmetry of relativistic physics. In traditional electrodynamics, described by Maxwell's equations, the laws of electromagnetism are the same in all inertial frames of reference, a key feature derived from Lorentz symmetry.
Here is a list of some well-regarded textbooks in the field of electromagnetism, suitable for various levels of study: ### Introductory Textbooks 1. **"Introduction to Electrodynamics" by David J. Griffiths** - A widely used undergraduate textbook known for its clear explanations and problem sets. 2. **"Electricity and Magnetism" by Edward M. Purcell and David J.
The Leontovich boundary condition is a type of boundary condition used in electromagnetic theory, particularly in the context of analyzing wave propagation and scattering in dielectric and conducting materials. It is particularly relevant in scenarios involving surface waves or interfaces between different media. In essence, the Leontovich boundary condition applies to the tangential components of the electric and magnetic fields at the boundary between two different media. Specifically, it provides a way to account for surface impedance at the boundary.
Lenz's law is a principle in electromagnetism that describes the direction of induced electric current in a conductor due to a changing magnetic field. Formulated by Heinrich Lenz in 1834, the law states that the direction of the induced current will be such that it opposes the change in magnetic flux that produced it. In simpler terms, if a magnetic field through a loop of wire increases, the induced current will flow in a direction that creates a magnetic field opposing the increase.
The Larmor formula describes the power radiated by an accelerating charged particle, particularly in the context of classical electrodynamics. It is named after the British physicist Joseph Larmor, who derived the formula in the early 20th century.
Kinetic inductance is a phenomenon that arises in superconducting circuits and, more generally, in systems where the motion of charge carriers significantly affects the electrical properties of the material. It is a type of inductance related to the inertia of charge carriers (such as Cooper pairs in superconductors) when they are forced to change their motion due to an applied voltage or current. In classical inductance, the inductance arises from the magnetic field generated by the current flowing through a conductor.
Jefimenko's equations are a set of equations in electrodynamics that describe the electric and magnetic fields produced by time-varying charge and current distributions. They are noteworthy because they provide an explicit expression for electromagnetic fields resulting from arbitrary distributions of charges and currents, without requiring the use of the more complex concepts of potentials. These equations are derived from Maxwell's equations and are especially important in the theory of electromagnetic radiation.
"Introduction to Electrodynamics" is a widely used textbook written by David J. Griffiths, and it serves as a foundational resource for undergraduate students studying electromagnetism. The book covers the fundamental principles of electrodynamics, which is the branch of physics that deals with electric charges, electric fields, magnetic fields, and their interactions.
Inductively Coupled Plasma (ICP) is a type of plasma created using electromagnetic induction to ionize gases, typically a noble gas like argon. This technique is widely used in various scientific and industrial applications, particularly in the fields of analytical chemistry and materials science.
Induction heating is a process used to heat electrically conductive materials, mainly metals, by utilizing electromagnetic induction. This method involves the creation of an alternating magnetic field, which induces electric currents (known as eddy currents) within the conductive material. The resistance of the material to these currents generates heat due to the Joule heating effect.
Inductance is a property of an electrical circuit that quantifies the ability of a component, typically a coil of wire (known as an inductor), to store energy in a magnetic field when an electric current passes through it. It is defined as the ratio of the induced electromotive force (EMF) in the coil to the rate of change of current flowing through it.
Maxwell's equations are a set of four fundamental equations in physics that describe the behavior of electric and magnetic fields and their interaction with matter. The history of Maxwell's equations is a story of significant scientific development over the 19th century, involving several key contributors and ideas. ### Early Work on Electricity and Magnetism 1.
Galilean electromagnetism is a framework that attempts to describe electromagnetic phenomena using classical mechanics principles, particularly adhering to Galilean relativity rather than the more complete framework provided by Einstein's theory of special relativity. In classical physics, Galilean relativity holds that the laws of motion are the same in all inertial frames and that velocities are additive.
The Faraday paradox arises in the context of electromagnetic induction and involves the observation of how a changing magnetic field can affect a conductor, particularly when considering different frames of reference. Named after the British scientist Michael Faraday, the paradox illustrates concepts related to electromagnetism and special relativity.
Faraday's law of induction is a fundamental principle of electromagnetism that describes how a changing magnetic field can induce an electromotive force (EMF) in a circuit. Formulated by Michael Faraday in the 19th century, the law can be stated in two primary ways: 1. **Mathematical Formulation**: The induced EMF (ε) in a closed loop is proportional to the rate of change of the magnetic flux (Φ) through the loop.
The Ettingshausen effect is a phenomenon observed in certain materials, particularly in semiconductors and metals, where a temperature gradient induces a transverse electric field. This effect is essentially a thermoelectric effect related to the Seebeck effect, but it is specifically associated with the generation of transverse potential differences in response to a temperature difference across a conductor.
Electromotive force (EMF) refers to the energy provided per unit charge by a source of electrical energy, such as a battery, generator, or solar cell, when it generates electric current. Although it uses the term "force," EMF is not a force in the traditional sense; rather, it represents the potential difference (voltage) generated by a source when no current is flowing.
Electromechanical modeling refers to the process of representing and analyzing systems that involve both electrical and mechanical components. This interdisciplinary approach is used in various applications, such as robotics, motors, sensors, and mechatronic systems, where electrical signals and mechanical movements interact. The main objectives of electromechanical modeling include: 1. **System Representation**: Creating mathematical or computational models that describe the behavior of electromechanical systems.
Electromagnetic induction is a physical phenomenon in which a changing magnetic field within a closed loop induces an electromotive force (EMF) or voltage in that loop. This principle is fundamental to much of modern electrical engineering and forms the basis for many technologies, including generators, transformers, and inductors.

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact