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The ampere, in practice often shortened to amp, (symbol: A) is a unit of
electric current, or amount of electric charge per second. The ampere is an
SI base unit, and is named after André-Marie Ampère, one of the main
discoverers of electromagnetism.
Definition The ampere is a constant current which, if maintained in two
straight parallel conductors of infinite length, of negligible circular
cross section, and placed 1 metre apart in a vacuum, would produce between
these conductors a force equal to 2×10^?7 newton per metre of length.Paul
M. S. Monk, Physical Chemistry: Understanding our Chemical World, John
Wiley and Sons, 2004 [LINK:
http://books.google.com/books?vid=ISBN0471491802&id=LupAi35QjhoC&pg=PA16&lpg=PA16&ots=IMiGyIL-67&dq=ampere+definition+si&sig=9Y0k0wgvymmLNYFMcXodwJZwvAM]
online.The ampere is a base unit, along with the metre, kelvin, second,
mole,
