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# Coulomb’s Law

Through meticulously electrostatic interactions and the arrangement of atoms, will lead you on a deeper conceptual knowledge of the phenomenon of electric charge. Electric charge is a basic trait of nature that is affected by the structure of atoms. Benjamin Franklin gave the marking on the two types of electric charge as a positive charge and a negative charge. This is just a mere tagging, positive and not negative in the sense of less or more than zero. Positive and negative charges are complementary nature or complementary.

In an atom or object, if the amount of positive charge (derived from protons) together with negative charge (electrons come from), then the object atom or uncharged (neutral). However, given the electrons of an atom or objects can move, it can occur in an atom number of positive charges (protons) is not equal to the amount of negative charge (electrons). In other words, the charge of an object is determined by the number of protons and electrons. To determine whether an object is electrically charged or not, to use a tool called electroscope.

A balloon rubbed on a piece of cloth will stick in our bodies. Two balloons are rubbed in the same fabric will repel. This is a fundamental evidence that similar charge will repel, while dissimilar charges attract each other. Clothes are sticking together when taken out of the dryer, the dust on the TV or computer screen, little surprise when holding the door handle of the metal, is an example of static electricity.

Electric force is the attraction or repulsion which was first investigated by a great French physicist named Charles Coulomb (1736 1806), at the end of the 18th century physicists discovered that the force between the charge to work along the line connecting the two with a great big comparable to the two charges and inversely proportional to the square of the distance. These observations gave birth to Coulomb’s law which is mathematically written as follows:

Where:
F = coulomb force (in newtons), Ql, Q2 = the charge of each particle (in units of Coulomb),
r = the distance between the two charges (in meters),
k = constant electrostatically to a vacuum (9109 N.m2 / C2)

After studying electrical charge and Coulomb’s law, of course, you are more confident on the phenomenon of static electricity.