Electric field

Electric field means that space where voltage is applied.
It exists absolutely around the place where voltage is applied.

For example,connecting with an electric socket causes code voltage.

thus,It exists absolutely around the place where voltage is applied.

the Unit of voltage is kv/m or v/cm.

1 kv/m is equal to 10 v/cm.

Equations which are related to voltage


These equations are always filled in voltage.

Coulomb`s law

Cloulomb`s law is the equation that shows two things

One is rebounding between the particles which are clothed in same electrification.

The other is attraction between the particles which are clothed in different  electrification.


The equation that 　means Coulomb`s law.
q1 and q2 express the multiplication of two electric charges.

This equation is discovered in 1785 by Charles-Augustin de Coulomb.

He invented A twist balance that can measure very small change and mesured using it.

His achievement is praised and his name became unit.




Maxwell`s equations

All in a world which are concernd with phenomenons about electricity and magnetism can be explained by these equations.





These equations mean Maxwell`s equations.


To be honest,these are too difficult to understand.

Thus,we explain easily.


hese equations show 4 things.

①An electric charge causes an electric field.

②There is no source of a magnetic field.

③The phenomenon of electromagnetic induction.

④The change of an electric current or an electric field cause a magnetic field.

James Clerk Maxwell is a british physicist.

He established Maxwell`s equations in 1864.

He is respected as a great scholar of electricity and magnetism.





【Reference】

　http://www.tele.soumu.go.jp/kids/time2/time2.htm
　http://ja.wikipedia.org/wiki/シャルル・ド・クーロン
　http://ja.wikipedia.org/wiki/ジェームズ・クラーク・マクスウェル


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