Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

B Why is the Ampere a base unit?

  1. May 11, 2016 #1
    Just out of curiosity, why is the Ampere a base unit and not the Columb? It seems to me that charge is more fundamental than current. Thanks!
     
  2. jcsd
  3. May 11, 2016 #2
    It's easier to measure a current than a charge.
     
  4. May 11, 2016 #3

    rcgldr

    User Avatar
    Homework Helper

  5. May 12, 2016 #4

    f95toli

    User Avatar
    Science Advisor
    Gold Member

    And there are also a number of other reason. One very important property of the base units is that they are technologically/commercially important.. People forget that the SI is mainly a practical system for use in our everyday lives (which is why the Candela is a base unit) ; meaning practical considerations are more important that what is most satisfying from a philosophical point of view.

    The re-definition of the SI will see the Ampere (as well as a few other units) be re-defined, but it will still be the base unit for the electrical units,
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted