"एम्पियर": अवतरणों में अंतर

 

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

== व्याख्या ==

<!-- 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.