Coulomb's Law describes the magnitude of the force between two charges. Which option correctly identifies this concept?

• A. Rate of charge flow in a circuit
• B. Magnitude of the force between two charges
• C. Electric potential created by a charge
• D. Resistance offered by a conductor

Answer: (B)

Coulomb's law gives the magnitude of the electrostatic force between two point charges. It states the force is proportional to the product of the charges and inversely proportional to the square of the distance between them, F = k |q1 q2| / r^2, and it points along the line connecting the charges—repulsive if the charges have the same sign and attractive if they have opposite signs. This directly describes the magnitude of the force between two charges, which is exactly what the option identifies. The other ideas refer to current (rate of charge flow), electric potential (work per unit charge), and resistance (a property of materials), which are different concepts and not about the force between charges.