Manning, Kenneth V. Pennsylvania State University, University Park, Pennsylvania.
Last reviewed:October 2019
- Choice of units
- Right-hand rule
- Field near a current
- Related Primary Literature
- Additional Reading
A law of electromagnetism which expresses the contribution of a current element of length dl to the magnetic induction (flux density) B at a point near the current. Ampère's law, sometimes called Laplace's law, was derived by A. M. Ampère after a series of experiments during 1820–1825. It plays a fundamental role in the International System (SI) definition of the ampere. See also: Physical measurement
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