Coulomb's inverse-square law, or simply Coulomb's law, is an experimental law of physics that calculates the amount of force between two electrically charged particles at rest. This electric force is conventionally called the … See more

The constant of proportionality, $${\displaystyle {\frac {1}{4\pi \varepsilon _{0}}}}$$, in Coulomb's law: See more

An electric field is a vector field that associates to each point in space the Coulomb force experienced by a unit test charge. The strength and direction of the Coulomb force $${\textstyle \mathbf {F} }$$ on a charge $${\textstyle q_{t}}$$ depends on the … See more

Coulomb's law holds even within atoms, correctly describing the force between the positively charged atomic nucleus and each of the negatively charged electrons. This simple law also … See more

Ancient cultures around the Mediterranean knew that certain objects, such as rods of amber, could be rubbed with cat's fur to attract light objects like feathers and pieces of paper. See more

There are three conditions to be fulfilled for the validity of Coulomb's inverse square law:
1. The charges must have a spherically symmetric distribution (e.g. be point charges, or a charged metal sphere).
2. The … See more

Coulomb's law can be used to gain insight into the form of the magnetic field generated by moving charges since by special relativity, in certain cases the magnetic field can … See more