# What is the meaning of electromagnetic theory?

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Electromagnetic theory based on Maxwell’s equations establishes the basic principle of electrical and electronic circuits over the entire frequency spectrum from dc to optics. It is the basis of Kirchhoff’s current and voltage laws for low-frequency circuits and Snell’s law of reflection in optics.

## What is the electromagnetic theory?

Electromagnetic Theory covers the basic principles of electromagnetism: experimental basis, electrostatics, magnetic fields of steady currents, motional e.m.f. and electromagnetic induction, Maxwell’s equations, propagation and radiation of electromagnetic waves, electric and magnetic properties of matter, and …

## What does electromagnetic theory states?

The first law states that the electric flux which forms across a closed surface is proportional to the charge enclosed. The second law states that the magnetic flux induced across a closed surface is zero. The third law states that the magnetic fields which vary with time lead to an electric field.

## Why is it called electromagnetic?

The waves of energy are called electromagnetic (EM) because they have oscillating electric and magnetic fields. … If it has low frequency, it has less energy and could be a TV or radio wave. All EM energy waves travel at the speed of light.

## Why electromagnetic theory is needed?

EM theory is an essential basis for understanding the devices, methods, and systems used for electrical energy. Both electric and magnetic fields are defined in terms of the forces they produce.

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## Who invented electromagnetic theory?

About 150 years ago, James Clerk Maxwell, an English scientist, developed a scientific theory to explain electromagnetic waves.

## What is an example of an electromagnetic?

Radio waves, microwaves, visible light, and x rays are all examples of electromagnetic waves that differ from each other in wavelength. … Electromagnetic waves are produced by the motion of electrically charged particles.

## What is electromagnetic force example?

All of the light from the Sun and other sources consists of photons which are the electromagnetic force carriers. Magnets and the Earth’s magnetic field, which protects us from harmful radiation, are aspects of the electromagnetic force.

## What is called electromagnetic radiation?

electromagnetic radiation, in classical physics, the flow of energy at the universal speed of light through free space or through a material medium in the form of the electric and magnetic fields that make up electromagnetic waves such as radio waves, visible light, and gamma rays.

## What are the 4 main properties of electromagnetic waves?

Every form of electromagnetic radiation, including visible light, oscillates in a periodic fashion with peaks and valleys, and displaying a characteristic amplitude, wavelength, and frequency that defines the direction, energy, and intensity of the radiation.

## What are the 7 types of electromagnetic waves?

The electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays. To tour the electromagnetic spectrum, follow the links below!