What is Coulomb's Law and Principle of Superposition

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5-September-2019

Index:

• Coulomb's Law
• Principle of Superposition

Coulomb’s Law: 

The force of interaction (attraction or repulsion) between two point charges is directly proportional to the product of their masses and inversely proportional to the square of their distance.

Let q₁, q₂ are two point charges, the distance between them is r,

Where,   

K is the proportionality constant. It depends upon nature of medium separating the charges and on the system of units.

Formula of K in SI System:

Principle of superposition:

The resultant force on any charge is equal to the vector sum of coulomb forces acting on individual charges.

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