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 meter apart in a vacuum, would produce between these conductors a force equal to 2×10–7 newton per meter of length.
IN THIS, WHAT DO U MEAN BY "NEGLIGIBLE CIRCULAR CROSS SECTION" ?
2007-10-12 04:28:00 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Physics
It means small compared to the distance between them. This is so that there is negligible error in assuming that the infinitesimal individual contributions to force that act over the conductors' volumes act in the same direction, and that even though those contributions operate by an inverse square of distance rule, the mean distance can be assumed to be the center-to-center distance.
2007-10-12 07:51:07 · answer #1 · answered by kirchwey 7 · 0⤊ 0⤋