4.4.94 - Coulomb’s law

Use Coulomb's law F = Q1Q2/(4πε0r²) for the force between two point charges.

Use - coulomb’s law to connect the rule to the data and decision in the question.

This matters because - coulomb’s law determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - coulomb’s law to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Coulomb’s law is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.