Question

State the coulomb's law and write the expression

Answer 1

The Coulomb's Law Of Electrostatics state that :

Electrostatics force of attraction or repulsion is

• Directly proportional to the product of the two charges

• Inversely proportional to the the square of the the distance of separation between the charges.

$1) \: F \: \propto \: (q1)(q2)$

$2) \: F \: \propto \: \dfrac{1}{ {d}^{2} }$

Combining the 2 equations, we get :

$\therefore\: F \: \propto \: \dfrac{(q1)(q2)}{ {d}^{2} }$

Introducing a constant we get :

$\therefore\: F \: = \: k\dfrac{(q1)(q2)}{ {d}^{2} }$

The constant k is called Coulomb's Constant and can also be written as

$\dfrac{1}{4\pi\epsilon_{0}}$

Net Equation becomes :

$\boxed{ \red{ \huge{ \bold{ F \: = \: \dfrac{1}{4\pi \epsilon_{0} } \dfrac{(q1)(q2)}{ {d}^{2} } }}}}$

Answer 2

The magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them