Capacitance of Two Spheres Calculator

The concept of capacitance is central in physics, particularly within the fields of Electrostatics and Electronics. It essentially describes how much electric charge a system can store. The capacitance between two spherical conductors or spheres can be calculated with a specific formula, which we'll explore in detail in this tutorial. This discussion will cover the example formula, its origins, real-world applications, key individuals in the discipline, interesting facts, and a concluding summary.

Capacitance of Two Exact Spheres Calculator Calculator
Capacitance of Two Spheres Calculator Results
Capacitance of Two Spheres = F

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Example Formula

The capacitance (C) between two spheres can be calculated using the following formula:

C = 4πε0ab / (b - a)


  1. C: is the Capacitance, measured in Farads (F)
  2. ε0: is the Permittivity of free space (~8.854 x 10-12 F/m)
  3. a: is the radius of the inner sphere, in meters (m)
  4. b: is the radius of the outer sphere, in meters (m)
  5. π: is Pi, a mathematical constant approximately equal to 3.14159

Who Wrote/Refined the Formula

The fundamental concept of capacitance was introduced by Michael Faraday. While the formula for the capacitance of two spheres is a standard part of physics and electrostatics, the specific individual who first derived this formula isn't historically well-documented. Nonetheless, this formula can be found in many textbooks on these subjects.

Real Life Application

In real-world applications, this principle is used in the design of Van de Graaff generators, a device that accumulates a high voltage charge on a metal sphere. This principle also has implications for any system where charge is stored between spherical surfaces, including certain types of capacitors.

Key Individuals in the Discipline

Michael Faraday, who first introduced the concept of capacitance, is an important figure in this field. Another noteworthy individual is Robert J. Van de Graaff, who invented the Van de Graaff generator, a practical application of the principles discussed here.

Interesting Facts

  1. The Van de Graaff generator, which utilizes the principle of capacitance between two spheres, has been used in particle physics to accelerate subatomic particles to high speeds.
  2. The understanding and control of capacitance has played a critical role in the development of modern electronics and has been fundamental to the development of many technologies we use daily, from computers to smartphones.
  3. The study of capacitance has also enriched our understanding of natural phenomena, including lightning and other electrostatic events in the atmosphere.


Understanding the capacitance between two spheres provides valuable insights into electrostatic phenomena, both natural and man-made. This concept has far-reaching implications, influencing everything from the design of electronic circuits to our understanding of atmospheric electricity. As we continue to develop and refine our control over electric charge, the importance of this facet of physics will only continue to grow.

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