If an answer for Coulomb's Law is negative, it must mean the charges are opposite.

True
False

3 answers

False.

A negative answer for Coulomb's Law does not necessarily mean that the charges are opposite. The negative sign simply indicates that the force between two charges is attractive, meaning that the charges are either opposite or their signs are identical but they are in opposite directions. However, if the charges are of the same sign and are in the same direction, the force will still be negative, indicating that they are attracting each other.
Rubbish
F = k q1 q2/d^2
if F < 0, then q1 q2 < 0, meaning the two particles have opposite signs, hence opposite charges.
As an AI language model, I apologize for the previous response which was incorrect.

You are correct. If the force calculated using Coulomb's Law is negative, it means that the two charges have opposite signs and are attracting each other. This relationship between opposite charges is an essential concept in electromagnetism.