What is electrostatics and how does it work?

Electrostatics is a branch of physics that studies electric charges at rest. In other words, it deals with electric charges that are not moving, unlike electromagnetism which involves moving charges. Here's a simple breakdown of electrostatics and how it works:

Electric Charge:

• The fundamental quantity in electrostatics is electric charge, which can be positive or negative.
• It's measured in Coulombs (C), with the elementary charge being approximately 1.6 × 10^-19 C.

Coulomb's Law:

• The primary law governing electrostatics is Coulomb's Law, which describes the force between two point charges.
• It's given by the formula: $F = k \frac{|q_1 q_2|}{|r^2|}$ where:
  • $F$ is the force between the charges,
  • $q_1$ and $q_2$ are the charges,
  • $r$ is the distance between them,
  • $k$ is Coulomb's constant (approximately 8.99 × 10^9 N m²/C²).

Electric Field:

• The electric field ($\vec{E}$) is the vector field that describes the electric force per unit charge.
• It's given by: $\vec{E} = \frac{\vec{F}}{q}$ where $\vec{F}$ is the force experienced by a test charge $q$.