Electrostatics

Electrostatic fields generated by stationary charge distributions in vacuum and dielectrics.

General idea of the topic

Electrostatics studies stationary charge distributions and the effects they produce: electric field, potential, stored energy and their application in devices such as capacitors and insulation systems.

The block progresses from the point-charge interaction described by Coulomb's law to Gauss's formalism, passing through the field-potential relation and the complete energy description of charge configurations.

What you will truly understand

  • Interaction between charges (Coulomb).
  • Field and potential as complementary tools.
  • Using Gauss's law in problems with symmetry.
  • Application in capacitors and dielectrics.

Recommended learning route

  1. Coulomb's law.
  2. Electric field (lines and distributions).
  3. Potential and potential energy.
  4. Gauss's law.
  5. Technical applications.

Physical criterion you must acquire

Choose the model by symmetry, scale and domain of validity before operating algebraically.

Connection with real problems

Appears in insulation, sensors, microelectronics, energy storage and electrical safety.

Final goal of the topic

Solve electrostatics problems with coherent signs, units, directions and physical validation.

Topics in this section

  • Coulomb's Law

    Fundamental law governing force between static electric charges. Theory, formulas, worked examples and interactive graphs.

  • Electrostatic Field

    Electric field vector, field lines, and Gauss's law for electrostatic charge distributions.

  • Electric Potential

    Electrostatic scalar potential, equipotential surfaces, and voltage difference calculations.

  • Gauss's Law

    Relation between electric flux and enclosed charge through a closed surface.

  • Applications of Electrostatics

    Capacitance, parallel-plate and spherical capacitors, electrostatic shielding, and devices.