[Boost-bugs] [Boost C++ Libraries] #4418: units::electron_charge units::current incorrect

Subject: [Boost-bugs] [Boost C++ Libraries] #4418: units::electron_charge units::current incorrect
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-07-10 03:05:04

#4418: units::electron_charge units::current incorrect
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 Reporter:  mejames7760.atatatat.att.net  |       Owner:         
     Type:  Bugs                          |      Status:  new    
Milestone:  Boost 1.44.0                  |   Component:  None   
  Version:  Boost 1.40.0                  |    Severity:  Problem
 Keywords:  units charge current          |  
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 I was trying to implement http://hyperphysics.phy-astr.gsu.edu (Coulomb's
 Law example) and then determine the acceleration on a single charge "e" as
 a way of learning to use Boost::units.  I was having lots of errors with
 wrong units which I have finally traced to incorrect dimensions of
 electric_charge and current.  Please refer to the above link or any
 physics text book to verify the following.
 1. An "electron charge" is the base unit, you have "current" as a base
 unit.
 2. "current" is charge per time which is a derived unit which is measured
 in amps.
 3. "electron charge" is measured in number of electrons. A coulomb is the
 measure of the number of electrons and is 1/e.
 4. "electric_charge" is an okay term to use.
 5. If you swapped electric_charge <-> current you would still be wrong
 because current would then have charge*time instead of charge/time.
 Running Ubuntu 10.04 LTS with Boost 1.40.0

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/4418>
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