Coil Inductance Calculator

In the field of Physics, coil inductance refers to the property of a coil or an inductor to oppose changes in current flowing through it. It is a fundamental concept in electromagnetism and plays a significant role in various electrical and electronic devices. This tutorial explores coil inductance, including the associated calculations and formulas, real-life applications, key individuals in the discipline, and interesting facts. Understanding coil inductance is essential for the design and analysis of electrical circuits and systems.

Coil Inductance Calculator
Coil Inductance Calculator Results
Inductance = H

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Example Formula

The inductance (L) of a coil can be calculated using the following formula:

L = (μ₀N²A) / l


  1. L: Inductance of the coil
  2. μ₀: Permeability of free space (constant, approximately 4π × 10-7 H/m)
  3. N: Number of turns in the coil
  4. A: Cross-sectional area of the coil
  5. l: Length of the coil

Who Wrote/Refined the Formula

The formula for coil inductance has been refined and developed by various physicists and researchers in the field of electromagnetism. Notable contributors include Joseph Henry, Michael Faraday, and James Clerk Maxwell, who made significant advancements in understanding the relationship between electricity and magnetism and laid the foundation for the study of inductance.

Real Life Application

Coil inductance finds numerous real-life applications in electrical and electronic devices. One common application is in electric transformers, where inductance plays a crucial role in transferring electrical energy between primary and secondary coils. Inductors are also used in power supplies, filters, and oscillators to control current flow, store energy, and stabilize circuit operation.

Key Individuals in the Discipline

Several individuals have made significant contributions to the field of electromagnetism and the study of inductance. Notable figures include Joseph Henry, who discovered electromagnetic induction and made key advancements in electromagnetism in the 19th century. Michael Faraday's work on electromagnetic fields and induction also laid the groundwork for understanding coil inductance. James Clerk Maxwell's equations further advanced the understanding of electromagnetism and provided a comprehensive mathematical framework for the field.

Interesting Facts

  1. The unit of inductance, the henry (H), is named after Joseph Henry, in recognition of his contributions to the field of electromagnetism.
  2. Coil inductance can create a magnetic field that stores energy and opposes changes in current, leading to phenomena such as self-induction and electromagnetic interference.
  3. Inductance is a crucial parameter in the design of circuits and systems, affecting their behavior, stability, and response to changes in current.


Coil inductance is a fundamental concept in Physics and electromagnetism. It plays a vital role in various electrical and electronic devices, enabling the control of current flow, energy storage, and the operation of transformers, power supplies, and filters. Understanding coil inductance and its associated calculations and formulas is essential for engineers, physicists, and anyone working with electrical circuits and systems.

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