a m ampère

Science Dictionary
ampere   (ām'pîr')  Pronunciation Key 
The SI unit used to measure electric current. Electric current through any given cross-section (such as a cross-section of a wire) may be measured as the amount of electrical charge moving through that cross-section in one second. One ampere is equal to a flow of one coulomb per second, or a flow of 6.28 × 1018 electrons per second.
American Heritage
Science Dictionary
Ampère   (ām'pîr', äm-pěr')  Pronunciation Key 
French mathematician and physicist who is best known for his analysis of the relationship between magnetic force and electric current. He formulated Ampère's law, which describes the strength of the magnetic field produced by the flow of energy through a conductor. The ampere unit of electric current is named for him.
The American Heritage® Science Dictionary
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