Coulomb’s law of electrostatics

 Coulomb’s law of electrostatics

Coulomb’s law: This is the fundamental law of electrostatics without this law we cannot understand the nature and properties of charges and their behavior so to understand the nature we must know about this law proposed by the French physicist Charles-Augustin de Coulomb in 1785 to find the nature of charges so the law is given below

Statement: “The force of attraction or repulsion between two charges is directly proportional to the magnitude of charges and inversely proportional to the square of the distance between them.”

So from the statement, we conclude that the force depends upon the charge magnitude which means that the higher the magnitude, the higher the force, and the force is smaller than the square of the distance between them which means that the force will be fourth times small if we increase the 2 times

Consider two objects whose mass has m1 and m2 and their charges q1 and q2 and the distance between them is r so according to the statement of the law we can write it

                                                                Fα q1q2───── 1

                                                                Fα1/r2 ────── 2

Combining the equation 1 and 2 we get

                                                                Fαq1q2/r2

                                                                F=k q1q2/r2

This is the formula for the Coulombs law for charges which shows the relation between the charges and the will any type means that attractive or repulsive.

Unit of the Coulomb law: So it is the force its unit is newton and the distance si unit is a meter so the unit of Coulomb law is newton per second.

Dependence of k: K is the constant of proportionality, which depends on the nature of the medium. This means that the value changes when we change the nature of the medium. The value of k in air is 9*109 Nm2/c2. When we change the medium, the value of k also changes, and then we represent the Greek word epsilon(ε). When we insert any medium between them then we talk about the relative epsilon which is less than the air.

So here the question arises what is the difference between the gravitational force and the Coulomb law of attraction because the nature of both forces is the same so here we discuss the few differences between the gravitational force and the Coulomb law below:

The difference between the Coulomb law and gravitational law:

1)      Coulomb force is both attraction and repulsion while the gravitational force is only attractive

Force.

2)      Gravitational force is dependent upon the masses of an object while the coulomb force is

 Depend upon the charges of an object.

3)      The equation of both laws is similar to the appropriate constants applied.

So these are the differences between the Coulomb law and gravitational force.

Applications of Coulomb's Law:  There are a few applications of Coulomb’s law which are given below:

1)      Coulomb’s law is used to calculate the force between the charges.

2)      With the help of this law we understand the behavior of charges.

3)      With the help of this law we measured charges or verified the properties of the material.

4)      Explaining the atomic structure and bonding of atoms.

There are a few limitations of the Coulomb law which are given below.

1)      This law only applies to point charges.

2)       This law valid only on the stationary charges.

So this is the complete discussion about the Coulomb law.