Electrostatic Energy Density Calculator

Electrostatic energy density is a fundamental concept in electromagnetism, a branch of physics that studies electric and magnetic phenomena. This density represents the amount of electrostatic energy stored in a given volume of space, attributed to the presence of an electric field. In this tutorial, we will go through the formula, its history, its real-world applications, key contributors to the field, and some interesting facts about electrostatic energy density.

Energy Density in Electrostatic Field Calculator
Electrostatic Energy Density Calculator Results
Energy Density (u) = FV2/m3

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Example Formula

The formula for electrostatic energy density (u) is as follows:

u = ε0/2 × E2
  1. u: This is the electrostatic energy density, expressed in Joules per cubic meter (J/m3).
  2. ε0: This is the permittivity of free space, a physical constant approximated to 8.854 × 10-12 Farads per meter (F/m).
  3. E: This is the magnitude of the electric field, measured in Volts per meter (V/m).

Who wrote/refined the formula

The formula and the concept of electrostatic energy density are fundamental in the field of electromagnetism, which was revolutionized by James Clerk Maxwell in the 19th century. His famous Maxwell's Equations provided a unified description of electricity and magnetism. The concept of energy density, including electrostatic energy density, plays a significant role in this field, impacting areas such as electrical engineering and quantum field theory.

Real Life Application

One key application of electrostatic energy density is in the design and functioning of capacitors, a fundamental component in many electronic devices. Capacitors store and release energy in an electric field, and the concept of electrostatic energy density helps determine how much energy a capacitor can store for a given volume, informing their design and use in various electronic devices, from smartphones to electric cars.

Key individuals in the discipline

James Clerk Maxwell is a crucial figure in this discipline. His work in the 19th century laid the foundation for the modern understanding of electromagnetism, including concepts like electrostatic energy density. His contributions to this field form the basis for many technological advancements we enjoy today.

Interesting Facts

  1. The understanding of electrostatic energy density has been critical in the development of technologies like capacitors, which play a crucial role in virtually all electronic devices we use today.
  2. Electrostatic energy density, being a key concept in electromagnetism, is integral to our understanding of light as an electromagnetic wave.
  3. The concept of energy density, including electrostatic, also appears in other contexts in physics, such as in quantum field theory, indicating the depth and breadth of its relevance in the field.


Understanding electrostatic energy density is crucial for studying electromagnetism and advanced physics. From helping design better capacitors to enhancing our understanding of electromagnetic waves, this concept has significant real-world applications and impacts. The work of physicists like James Clerk Maxwell continues to inspire ongoing research and advancements in the field.

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