unit of measurement for an electrical current. Named for the French physicist Andre Marie Ampere.

Abbreviation for Amp is A.

Mathematical symbol is "I". Milli-Amps = 1/ thousandths of an Amp.

This is the rate at which electrons flow in a wire.The units are coulombs per second, or since an electron has a charge of 1.602 x10^-19 coulombs, an amp is 6.24 x 10⁺¹⁸ electrons persecond. Think of marbles rolling through a tube. If 6.24 x 10⁺¹⁸ passesby in 1 second you would have an amp of marbles.