Introduction to Electromagnetism

Lighting Up Electromagnetism

The study of affects of electric charges both at rest and in motion is known as electromagnetism.  Electromagnetic theory is important to understanding nature since it is one of the four fundamental forces of nature and it is the main binding force of the atom outside the nucleus. .

 Charge is the property of subatomic particle that gives rise to electric fields. The charge of a particle can be negative, positive, or neutral. Charge is a fundamental property of matter. Magnetism is the force of attraction or repulsion resulting from the motion of electric charges. While the force lines associated with electric charges tend to be strait, magnetic force lines tend to be circular.

The branch of physics dealing with the electromagnetic forces between electric charges called electrodynamics . In its most basic form electrodynamics deals with the affect of charges in relative motion. The mutual production of electric and magnetic fields forms the bases of the unification of eclectic and magnetic fields. All else in electromagnetism extends from this starting principles.

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Moving Things with Force

Force is that which causes a free body to undergo acceleration.

There are four fundamental  forces in Nature. Gravity which is the mutual attraction of all matter in the universe it is what holds you to the Earth.  Electromagnetism which is the mutual attraction and repulsion of charged partials. The weak nuclear force is that which regulates types of nuclear decay such as Bata decay by overcoming the strong nuclear force. The strong nuclear force is the binding force that holds the atomic nucleus together against the tendency of positively charged protons.

Force causes mater to accelerate which is the main function of force by definition. It can be used to overcome other forces such as friction gravity. Force also holds things together since the electromagnetic force holds an object together including your body and the strong nuclear force holds atomic nuclei together. It can break things apart such as bombs or the force resulting from ramming two things together which can cause them to shatter and the peaces to fly apart.

Regardless of its source force causes acceleration. Force can also stop acceleration by resisting another force. Force holes thing together so force does indeed bind us together so it looks like Ben Kenobi got it partly right. Force makes our existence possible.