Understanding the Concepts

* Electric Field (E): A region of space where a charged object experiences a force. It's measured in Newtons per Coulomb (N/C).

* Electric Force (F): The force experienced by a charged object in an electric field. It's measured in Newtons (N).

* Charge (q): The fundamental property of matter that causes it to experience electrical forces. It's measured in Coulombs (C).

The Relationship

The relationship between these quantities is given by:

* F = qE

Where:

* F is the electric force

* q is the magnitude of the charge

* E is the electric field strength

Solving the Problem

1. Identify the known values:

* F = 3.0 x 10⁻³ N

* E = 2.0 N/C

2. Rearrange the equation to solve for q:

* q = F / E

3. Substitute the known values:

* q = (3.0 x 10⁻³ N) / (2.0 N/C)

4. Calculate the charge:

* q = 1.5 x 10⁻³ C

Answer: The magnitude of the charge is 1.5 x 10⁻³ Coulombs.