electromagnetism

Coulomb's Law

Set charge magnitudes, signs, and separation to compute electrostatic force and visualize the 3D electric field as radiating vector arrows between point charges.

Coulomb's Law

A-Level

Coulomb's Law describes the electrostatic force between two point charges: it is proportional to the product of charges, inversely proportional to the square of separation, and acts along the line joining them. Like charges repel, opposite charges attract.

Charge 13.0μC

Charge 2-3.0μC

Separation2.0m

📐 Formulas

F = \frac{1}{4\pi\epsilon_0}\frac{|q_1 q_2|}{r^2}Electrostatic force magnitude

\epsilon_0 = 8.85 \times 10^{-12}\,\text{F/m}Permittivity of free space

k = \frac{1}{4\pi\epsilon_0} = 8.99 \times 10^9Coulomb constant

📋 Syllabus

AQA3.7.3

EdexcelTopic 7

OCR6.1.1