DC Voltage Drop Across Inductance Calculator

In the field of Physics, particularly in Electromagnetism and Electrical Engineering, the voltage across an inductor plays a crucial role. An inductor is a passive electrical component that can store energy in a magnetic field created by the electric current passing through it. The voltage across an inductor is determined by the rate of change of the current through it and the inductor's inductance. This tutorial will guide you through the process of calculating the voltage across an inductor.

DC Voltage Drop Calculator
DC Voltage Drop Across Inductance Calculator Results
Voltage across Inductor = dB

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Example Formula

The voltage across an inductor can be calculated using Faraday's Law of electromagnetic induction. The formula is:

V = L × (di/dt)


  1. V is the voltage across the inductor.
  2. L is the inductance of the inductor.
  3. di/dt is the rate of change of current through the inductor over time.

Who wrote/refined the formula

The concept and the mathematical representation of electromagnetic induction were first introduced by Michael Faraday in 1831. The phenomenon and its applications in inductors and many other electrical devices are fundamental to electromagnetism and electrical engineering.

Real Life Application

The principle of voltage across an inductor is used in various real-life applications, such as power supply smoothing in DC power supplies, in the form of chokes, or inductors, to filter out high-frequency noise in power signals. The same principle is also used in transformers used in power grids and electronic devices.

Key individuals in the discipline

Michael Faraday, an English scientist, is one of the key figures in the study of electromagnetism and electrochemistry. His groundbreaking work on electromagnetic induction in 1831 laid the foundation for electrical engineering. Faraday's experiments and formulas have greatly contributed to the understanding and development of the concept of inductors and the voltage across them.

Interesting Facts

  1. Inductors are widely used in analog circuits and signal processing. They are also essential components in electrical transmission systems.
  2. The discovery and understanding of electromagnetic induction have revolutionized the field of electricity and magnetism, leading to significant technological advancements like electric motors and power generation.
  3. The unit of inductance in the International System of Units (SI) is named 'Henry' in honor of the American scientist Joseph Henry, who discovered self-inductance independently of Faraday.


The calculation of the voltage across an inductor is a fundamental concept in electromagnetism and electrical engineering. Understanding this principle has paved the way for the development of various electrical devices and systems that are integral to modern life. Whether it's in power supplies, transformers, or signal processing, the impact of these calculations is truly remarkable.

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