Ampere
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The ampere or amp (Symbol: A) is a unit of electric current or amount of electric charge each second. The amp is an standard unit. It is named after André-Marie Ampère who discovered electromagnetism.
Electric current is the rate of change or displacement of electric charge. One amp is the rate of one coulomb per second.
The amp is defined by two wires that go in the same direction as each other. They are placed one metre apart in a vacuum. They are infinitely long and very thin. One amp is the current that would produce an attractive force of 2×10–7 Newton per metre of length between these wires.[1]
[change] References
- ↑ Paul M. S. Monk, Physical Chemistry: Understanding our Chemical World, John Wiley and Sons, 2004 online.
