EECTROMAGNETISM
Electromagnetism is a branch of physics involving the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles.
The electromagnetic force is carried by electromagnetic fields composed of electric fields and magnetic fields, and it is responsible for electromagnetic radiation such as light. It is one of the three fundamental interactions (commonly called forces) in nature.
Originally, electricity and magnetism were considered to be two separate forces. This view changed with the publication of James Clerk Maxwell's 1873 A Treatise on Electricity and Magnetism in which the interactions of positive and negative charges were shown to be mediated by one force. There are four main effects resulting from these interactions, all of which have been clearly demonstrated by experiments:
- Electric charges attract or repel one another with a force inversely proportional to the square of the distance between them: unlike charges attract, like ones repel.
- Magnetic poles (or states of polarization at individual points) attract or repel one another in a manner similar to positive and negative charges and always exist as pairs: every north pole is yoked to a south pole.
- An electric current inside a wire creates a corresponding circumferential magnetic field outside the wire. Its direction (clockwise or counter-clockwise) depends on the direction of the current in the wire.
- A current is induced in a loop of wire when it is moved toward or away from a magnetic field, or a magnet is moved towards or away from it; the direction of current depends on that of the movement.Hans Christian ?rsted (/???rst?d/ UR-sted,[2] Danish: [h?ns k???stj?n ????st?e]; often rendered Oersted in English; 14 August 1777 – 9 March 1851) was a Danish physicistand chemist who discovered that electric currents create magnetic fields, Looking back on number one,
Gravity Equation. ... The one most people know describes Newton's universal law of gravitation: F = Gm1m2/r2, where F is the force due to gravity, between two masses (m1 and m2), which are a distance r apart; G is the gravitational constant and The Coulomb's law formula is: F = Ke * q1 * q2 / r2,there are some that has taken the similarity in these equation to requisite a combining of the EM force and gravity as a unified force,personally i believe they need to repeat the course or not waste their money....again,
Looking back on number two,The magnetic force between a pole of one long bar magnet and that of another was described by an inverse square law,Let’s try something on this by taking two equal bar magnets on the table placed side by side,what we find out is there is no interactions,the magnetic field lines combine to a weak dynamic state,the intergration of the fields to one identical force remains constant to the inverse,no increase nor decrease in field strength nor density,yet an increase in the space the field occupies,What this asserts is there is no interference between the separate fields at the point of convergence,they become one ,extending only the potential”energy” of the system giving rise to the ability of a broken magnet to create the lost field,this however is pure conjecture.
Looking back on number three,circumferential meaning: going around the outside edge of a round or curved area, object, organ, or body part,unlike the magnetic wave lines of the bar magnetic,the wire has a circumference or gauge the magnetic field follows the shape of the object possessing the electric current,or the angular moment of the magnetic field,The magnetic energy contribution is proportional to the component of total angular momentum along the direction of the magnetic field, which is usually defined as the z-direction. ... If the external field is very strong,then it can decouple the spin and orbital angular momenta.
In your studies of electromagnetism,by the time you feel you have grasped the concept you would be accepting your masters degree,enjoy, it is a fascinating topic that has given us so much,a hear felt thanks to;
Jan 1, 1785. Charles-Augustin de Coulomb. ...
- Jan 1, 1800. Alessando Volta. ...
- Apr 21, 1820. Hans Christian Oersted. ...
- Sep 18, 1820. André-Marie Ampère. ...
- Jan 1, 1827. Gerog Ohm. ...
- Jan 1, 1831. Joseph Henry. ...
- Jan 1, 1831. Michael Faraday. ...
- Jan 1, 1833. Karl Friedrich Gauss.
- and your name here.....
- physics is amazing.