Gauss Law And Coulomb's Law

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INTRODUCTION TO ELECTROSTATIC
In this modern world, electrostatic plays an important role in several fields. There are many laws related to electrostatic field, however, there are two fundamental laws, which is Coulomb’s Law and Gauss’s Law. Gauss’s Law can be used to derive Coulomb’s Law, and Coulomb’s Law is also can be used to derive Gauss’s Law.
Coulomb’s Law
Coulomb's law is a law of physics describing the electrostatic interaction between electrically charged particles. It was studied and first published in 1783 by French physicist Charles Augustin de Coulomb and was essential for the development of the theory of electromagnetism.
It deals with the force a point charge exerts on another point charge. A point charge means a charge that is located on a body whose dimensions are much smaller than other relevant dimensions. For example, a collection of electric charges on a pinhead can be regarded as a point charge. Charges are generally measured in coulombs(C). One coulomb is approximately
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The charge is generated by corona wire, which is a fine wire with high voltage passing through it. When high voltage pass through a corona wire, it will ionizes air surrounding the wire, forming negative charge. These charge is then stick to the surface of the drum.
Step three – Laser Scanning Unit
After a layer of negative charge has been covered on the drum, the drum is then proceed into next step, which is laser scanning unit. In this process, laser beam is used to neutralize unwanted negative charge, leaving only those which are needed. This will form the required image on the drum, but in the form of negative charge. During this process, when the laser beam shines on the drum, it will cause the photoreceptor on the drum to behave like a conductor. This will neutralize the negative charge on the surface of the drum.
Step four –

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