Ampere circuital law: Learn about Ampere ’s

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. Using Ampère’s Law to Calculate the Magnetic Field Due to a Wire Use Ampère’s law to calculate the magnetic field due to a steady current I in an infinitely long, thin, straight wire as shown in Figure 12 6 2. Figure 12 6 2: The possible components of the magnetic field B due to a current I, which is directed out of the page. The radial component is zero because the angle between the magnetic field and the path is at a right angle. The integral form of Amperes’ Circuital Law (ACL) for magnetostatics relates the magnetic field along a closed path to the total current flowing through any surface bounded by that path. What Is Ampere ’s Circuital Law ? Ampere ’s circuital law can be written as the line integral of the magnetic field surrounding closed-loop equals the number of times the algebraic sum of currents passing through the loop. Suppose a conductor carries a current I, then this current flow generates a magnetic field that surrounds the wire.