Electric Field (2D): Coulomb's Law in Action

What the Electric Field Is

The electric field is a vector field that associates to each point in space the force per unit of charge exerted on an infinitesimal positive test charge at rest. It is named after the physicist Charles-Augustin de Coulomb, who formulated Coulomb's law.

This field lines visualization helps us visualize these forces and understand how charges interact with one another.

Why It Happens

According to Coulomb’s law, the magnitude of the electric force between two point charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them.

The direction of the field at any point is given by the direction of this force if a positive test charge were placed at that point.

Real-World Examples

In everyday life, electric fields are crucial in technologies such as electrostatic precipitators used for air purification and photocopiers.

Understanding these fields is also essential in designing electronic devices like capacitors and transistors.

Implications of the Electric Field

Electric fields play a critical role in phenomena such as lightning, where charges accumulate to create strong electric fields that eventually discharge.

In medical applications, electric fields are used in treatments like deep brain stimulation for neurological disorders.

Frequently asked questions

Try it live

Everything above runs in your browser — open Electric Field (2D) — Coulomb's Law Field Lines & Test Charges and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.