"एम्पियर": अवतरणों में अंतर

 

 

{{विद्युतचुम्बकत्व3|edyn=true}}

 

:<math>\mathrm{1 \,A= 1 \frac{\,C}{s}} \,</math>

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<!-- Because it is a base unit, the definition of the ampere is not tied to any other electrical unit. The definition for the ampere is equivalent to fixing a value of the [[Permeability (electromagnetism)|permeability]] of vacuum to ''μ''₀ = 4π×10⁻⁷ H/m. Prior to 1948, the so-called "international ampere" was used, defined in terms of the [[electrolysis|electrolytic]] deposition rate of [[silver]].<ref>Robert B. Northrop, ''Introduction to Instrumentation and Measurements'', CRC Press, 1997 [http://books.google.com/books?vid=ISBN0849378982&id=mcpcfpQfxB4C&pg=PA21&lpg=PA21&ots=ZTUUMNAShz&dq=ampere+1948+electrolytic++silver+international&sig=1Xv1-zsZ1pNuQuFjRzlhJaCWXiY online]</ref> The older unit is equal to 0.999&nbsp;85&nbsp;A.

 

:<math>\mathrm{I=Q/t} \,</math> -->

 

<!-- Since a coulomb is approximately equal to 6.24150948×10¹⁸ [[elementary charge]]s, one ampere is approximately equivalent to 6.24150948×10¹⁸ elementary charges, such as [[electron]]s, moving past a boundary in one second.

 

This redefinition of the kilogram has the effect of fixing the [[elementary charge]] to be ''e'' = 1.60217653{{e|-19}} [[coulomb|C]] and would result in a functionally equivalent definition for the [[coulomb]] as being the sum of exactly 6 241 509 479 607 717 888 elementary charges and the ampere as being the electrical current of exactly 6 241 509 479 607 717 888 elementary charges per second. This is consistent with the current 2002 CODATA value for the elementary charge which is 1.60217653×10^-19 ± 0.00000014×10^-19 C. -->

 

<!-- [[International Committee for Weights and Measures]] (CIPM) Recommendation 1 (CI-2005):

Preparative steps towards new definitions of the [[kilogram]], the ampere, the

{{इकाइयाँ}}

 

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See http://en.wikipedia.org/wiki/Wikipedia:Footnotes for a

== बाहरी कड़ियां ==

* [http://physics.nist.gov/cuu/ The NIST Reference on Constants, Units, and Uncertainty]

 

 

[[ar:أمبير]]

[[ast:Amperiu]]

[[be-x-old:Ампэр]]

[[bg:Ампер]]