A Level Physics ELECTROMAGNETISM Definition of the ampere.

THE AMPERE
We use the equation we derived, F = u0 I1I2 L/ 2 πa, as a definition of an ampere. Which is formally defined as

The currant which when flowing through two infinitely long conductors 1 metre apart in a vacum causes a force of 2 * 10-7 to act on any metre length.
The ampere is the most fundamental unit of electricity (not the coulomb which has dimensions of [I]1 [T]1)

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Rob Coles 29 May 1996 10:11:01 1