آمپر âmper (#)
*Fr.: ampère*
The → *SI unit* of → *electric current*;
symbol A. It is defined by taking the fixed numerical value of the
→ *elementary charge*, *e*, to be
1.602 176 634 × 10^{-19} when expressed in the unit
→ *coulomb* (C), which is
equal to A s, where the → *second* (s)
is defined in terms of Δν_{Cs}. Named after the French physicist and mathematician André-Marie Ampère (1775-1836),
one of the pioneers in studying electricity, who laid the foundation of
electromagnetic theory. |

قانون ِ آمپر qânun-e Âmper
*Fr.: loi d'Ampère, théorème ~*
One of the basic relations between → *electricity*
and → * magnetism*, stating quantitatively the relation of a
→ *magnetic field* to the
→ *electric current* or changing electric field that produces it.
Ampere's law states that the line integral of the magnetic field around an arbitrarily chosen
path is proportional to the net electric current enclosed by the path.
Also known as *Ampère's theorem*, *Ampère's circuital law*. → *ampere*; → *law*. |