Faraday's Law Calculator
Calculate the induced EMF from changing magnetic flux.
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Enter the number of turns in the coil, the change in magnetic flux in webers, and the time interval in seconds. The calculator computes the magnitude of the induced EMF.
About Faraday's Law
Faraday's law of electromagnetic induction, discovered by Michael Faraday in 1831, is one of the fundamental laws of electromagnetism. It explains how changing magnetic fields generate electric fields and is the operating principle behind generators, transformers, and inductors. The induced EMF is proportional to the rate of change of magnetic flux and the number of coil turns. This law is one of Maxwell's equations and underpins modern electrical power generation.
Frequently Asked Questions
What is Faraday's law of induction?
Faraday's law states that a changing magnetic flux through a coil induces an electromotive force (EMF). The induced EMF equals the negative rate of change of magnetic flux times the number of turns.
What is magnetic flux?
Magnetic flux is the product of the magnetic field strength and the area it passes through (perpendicular component). It is measured in webers (Wb).
Why is there a negative sign in Faraday's law?
The negative sign represents Lenz's law: the induced EMF opposes the change that caused it. This ensures energy conservation in electromagnetic induction.