A-Level Physics: Electric Fields and Coulomb's Law

Electric Fields and Coulomb's Law: Step-by-Step Guide

Step 1: Define an electric field as the region around a charge where a force would act on another charge. Step 2: Recall Coulomb's Law, F = k·(q₁q₂)/r², where k is Coulomb's constant. Step 3: Calculate the force between two point charges by substituting their magnitudes, signs, and separation distance. Step 4: Determine the direction of the force using the sign of the charges—like charges repel, opposite charges attract. Step 5: For multiple charges, compute the vector sum of individual forces to find the net force on a target charge.