Question

derive coulumbs law according to the first chapter of physics "electric charges and fields".....plzz avoid copy and paste method...​

Answer 1

We can prove Coulomb’s law. Let us consider two charges, ‘q1‘ and ‘q2‘; separated by a distance ‘r.’ The force of attraction or repulsion is ‘F’;

F  ∝ q1q2 or F  ∝  1/r2

Adding the constant of proportionality, we get;

(in image)

In the above equation, k= 1/4 π ε0. ε0 describes the permittivity of a vacuum. The value of k is nearly 9 × 109 Nm2/ C^2; if we consider the value of ε0 in SI units as 8.854 × 10^-12 C^2 N^-1 m^-2.

Moreover, this theory also describes that like charges repel each other and opposite charges attract each other.

(in image)