Ampere Circuital Law Ampere Circuital Law : In classical electromagnetism, this concept of law gives a relation between the magnetic field and the electric current passing through the closed loop. A French scientist André-Marie Ampere proposed the discovery of Ampere ’s Circuital Law in the year 1826. Ampere’s Circuital Law states the relationship between the current and the magnetic field created by it. This law states that the integral of magnetic field density (B) along an imaginary closed path is equal to the product of current enclosed by the path and permeability of the medium. James Clerk Maxwell had derived that. Learn about Ampere ’s law , a mathematical statement that relates electric current and magnetic field. Find out how to derive, use, and apply it to different devices and situations. Ampere ’s Law Ampere 's Law is a key rule in electromagnetism that links the magnetic field around a closed loop to the current passing through it. It says the magnetic field around the loop depends directly on the total current inside. This law is especially useful for calculating magnetic fields in simple, symmetrical setups like long wires, solenoids, and toroids. It’s an important part of Maxwell’s equations and helps explain how magnetic fields work in many situations. 1.0 ...