The Electric Dipole Moment is a vector that describes the magnitude and direction (from negative to positive) of the electric dipole.
The Electric Dipole Moment is written as p=q*s.
One use for the Electric Dipole Moment is with the relation for the Electric Field Intensity of a dipole.
MAGNETIC MOMENT
⚜ What is the Magnetic Moment? ⚜
The Magnetic Moment is defined as the product u=I*A of a circular current loop.
One use for the Magnetic Moment is in the relation for the torque on a current loop placed in a magnetic field.
The Magnetic Moment is also used with electron orbits in atoms and their angular momentum.
MAXWELL'S EQUATIONS
⚜ What are Maxwell's Equations? ⚜
Maxwell's Equations were developed by James Clerk Maxwell from existing electromagnetic laws and were used to predict the existence of electromagnetic waves.
Maxwell's Equations consist of four different equations. They are Faraday's Law, the Ampere-Maxwell Law, which is a modified Ampere's law that includes the Displacement Current, Gauss's Law for Electric fields and Gauss's Law for Magnetic fields.
ELECTROMAGNETIC WAVES
⚜ What are Electromagnetic Waves? ⚜
Electromagnetic Waves are self-propagating electric and magnetic fields that travel through space without requiring a medium.
The Electric and Magnetic fields of Electromagnetic Waves oscillate and propagate perpedicular to each other, which makes them Transverse waves.
Electromagnetic Waves carry energy and momentum and travel at the speed of light when propagating in a vacuum.
The most common Electromagnetic Waves are radio waves that are generated by LC oscillator electric circuits.
TESLA COIL
⚜ What is a Tesla Coil? ⚜
A Tesla Coil is a high frequency resonant oscillator invented by Nicolas Tesla in 1891.
The Tesla coil is basically a high voltage transformer that generates high frequency alternating voltage and current that can travel through the air.
At the heart of a Tesla coil is a spark gap and a high voltage capacitor that work with induction coils to create an oscillator circuit.
Tesla coils are still being produced and modern Tesla coils can easily be purchased.
HERTZ RESONATOR
⚜ What is a Hertz Resonator? ⚜
A Hertz Resonator was an induction coil developed by Heinrich Hertz in 1886 to test Maxwell's prediction of electromagnetic waves.
The resonator was used with an electrostatic spark gap. When a spark was generated at the spark gap, a spark appeared at the resonator, showing that the spark energy had travelled through the air.
TRIVIA
🔔 QUESTION : Which engineer and inventor proved experimentally that electromagnetic waves can be transmitted over long distances?
💡 Hover or Tap for the ANSWER! 💡
Guglielmo Marconi in 1901 transmitted a short message in Morse code from Cornwal, England that was received at Signal Hill in Newfoundland, Canada. This demonstrated the transmission of electromagnetic waves over long distances was possible.
IMPEDANCE
⚜ What is Impedance? ⚜
Impedance is the opposition to a changing electric and magnetic flux without energy being dissipated.
Impedance is expressed using Inductive and Capacitive Reactance and also Permeability and Permittivity.
The Impedance of Free Space is the opposition to the flow of changing electric and magnetic flux, which define electromagetic waves, in the vacuum of outer space.
ELECTRIC DISPLACEMENT
⚜ What is the Electric Displacement? ⚜
The Electric Displacement is another name for the Electric Flux Density.
The Electric Displacement is important because it shows that an electric charge does not need to be in motion to produce a magnetic field, but simply needs to be changing in magnitude.
DISPLACEMENT CURRENT
⚜ What is Displacement Current? ⚜
The Displacement Current was proposed by James Clerk Maxwell to explain the existence of a magnetic field where no electric current was flowing.
The Displacement Current is part of the Ampère-Maxwell law which states that an Electric Flux due to an electric charge that is changing in time will also produce a Magnetic Field Intensity in the same way an electric current does.
The magnetic field intensity between the plates of a charging capacitor is an example of The Displacement Current.
