[sdiy] Trying to establish confidence in my test equipment

[Harry Bissell Jr]

OK here's the link.  AMPS ~is~ the reference standard.
  
  http://physics.nist.gov/cuu/Units/units.html
  
  here is the history of it...
  
  http://physics.nist.gov/cuu/Units/ampere.html
  
  Learn something new every day... :^P
  
  Newbie alert... this will not affect how we apply Ohms law...
  so your homework is still due on TIME...
  
  (that being time in units of seconds... per NIST (SI) units :^)
  
  H^) harry

Antti Huovilainen <ajhuovil at cc.hut.fi> wrote:  On Thu, 9 Mar 2006, Harry Bissell Jr wrote:

> Woah.  Can you direct me to where you read that 'volt' is a derived
>  standard ???

http://en.wikipedia.org/wiki/Volt#Definition
http://en.wikipedia.org/wiki/Ampere#Definition

>  I think it is the amp that is the derived standard... as it can only 
> exist as the action of the potential (volt) across a resistance (ohm).

What about magnetically induced currents or superconductivity?
In both cases the current is not due to potential across a resistance.

Antti

"No boom today. Boom tomorrow. There's always a boom tomorrow"
   -- Lt. Cmdr. Ivanova

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